Notice2026-02004

Self-Regulatory Organizations; Nasdaq PHLX LLC; Notice of Filing and Immediate Effectiveness of Proposed Rule Change To Amend Electronic FLEX Rules

Primary source

Metadata and text below are from the Federal Register, a public-domain U.S. government work. Always verify the official published version before relying on it for any legal matter.

Published
February 2, 2026

Issuing agencies

Securities and Exchange Commission

Full Text

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<title>Federal Register, Volume 91 Issue 21 (Monday, February 2, 2026)</title>
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[Federal Register Volume 91, Number 21 (Monday, February 2, 2026)]
[Notices]
[Pages 4677-4690]
From the Federal Register Online via the Government Publishing Office [<a href="http://www.gpo.gov">www.gpo.gov</a>]
[FR Doc No: 2026-02004]



[[Page 4677]]

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SECURITIES AND EXCHANGE COMMISSION

[Release No. 34-104733; File No. SR-Phlx-2026-05]


Self-Regulatory Organizations; Nasdaq PHLX LLC; Notice of Filing 
and Immediate Effectiveness of Proposed Rule Change To Amend Electronic 
FLEX Rules

January 28, 2026.
    Pursuant to Section 19(b)(1) of the Securities Exchange Act of 1934 
(``Act''),\1\ and Rule 19b-4 thereunder,\2\ notice is hereby given that 
on January 27, 2026, Nasdaq PHLX LLC (``Phlx'' or ``Exchange'') filed 
with the Securities and Exchange Commission (``SEC'' or ``Commission'') 
the proposed rule change as described in Items I, II, and III below, 
which Items have been prepared by the Exchange. The Commission is 
publishing this notice to solicit comments on the proposed rule change 
from interested persons.
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    \1\ 15 U.S.C. 78s(b)(1).
    \2\ 17 CFR 240.19b-4.
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I. Self-Regulatory Organization's Statement of the Terms of Substance 
of the Proposed Rule Change

    The Exchange proposes to introduce enhancements to electronic FLEX 
trading by (i) allowing prices to be expressed as a percentage, (ii) 
adopting a Delta-Adjusted at Close order instruction, and (iii) 
adopting rules to permit the legs of a complex FLEX Order to include a 
combination of FLEX Option series and non-FLEX Option series (``FLEX v. 
Non-FLEX Order'').
    The text of the proposed rule change is available on the Exchange's 
website at <a href="https://listingcenter.nasdaq.com/rulebook/phlx/rulefilings">https://listingcenter.nasdaq.com/rulebook/phlx/rulefilings</a>, 
and at the principal office of the Exchange.

II. Self-Regulatory Organization's Statement of the Purpose of, and 
Statutory Basis for, the Proposed Rule Change

    In its filing with the Commission, the Exchange included statements 
concerning the purpose of and basis for the proposed rule change and 
discussed any comments it received on the proposed rule change. The 
text of these statements may be examined at the places specified in 
Item IV below. The Exchange has prepared summaries, set forth in 
sections A, B, and C below, of the most significant aspects of such 
statements.

A. Self-Regulatory Organization's Statement of the Purpose of, and 
Statutory Basis for, the Proposed Rule Change

1. Purpose
    The Exchange proposes to introduce FLEX enhancements by (i) 
allowing prices to be expressed as a percentage, (ii) adopting a Delta-
Adjusted at Close (``DAC'') order instruction, and (iii) adopting rules 
to permit the legs of a complex FLEX Order to include a combination of 
FLEX Option series and non-FLEX Option series (``FLEX v. Non-FLEX 
Order''). As discussed in detail below, the proposed changes would 
align the Exchange's FLEX rules with the FLEX rules of Cboe Exchange, 
Inc. (``Cboe''), and therefore raise no novel issues for the 
Commission. Each change will be described below.
FLEX Percentages
    The Exchange proposes to allow prices to be expressed as percentage 
of the closing value of the underlying equity security or index, which 
would align with the Cboe's FLEX rules. Prices in FLEX trading are 
allowed to be expressed as a fixed dollar and decimal amount. For 
example, Options 3A, Section 3(c)(6) stipulates that the exercise price 
for a FLEX Option \3\ may be in increments no smaller than $0.01. In 
addition, Options 3A, Section 4(a) stipulates that bids and offers for 
FLEX Options must be expressed in U.S. dollars and decimals in the 
applicable minimum increment as set forth in Options 3A, Section 5(a). 
Options 3A, Section 5(a), in turn, provides that the Exchange 
determines the minimum increment for bids and offers on FLEX Options on 
a class-by-class basis, which may not be smaller than $0.01 for the 
options leg of a FLEX Option.
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    \3\ The term ``FLEX Option'' means a flexible exchange option. A 
FLEX Option on an equity security may be referred to as a ``FLEX 
Equity Option,'' and a FLEX Option on an index may be referred to as 
a ``FLEX Index Option.'' See Options 3A, Section 1(b)(1).
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    The Exchange now proposes to allow prices in FLEX trading to be 
expressed using a percentage-based methodology that will be materially 
identical to Cboe. The proposed percentage-based methodology would be 
an alternative to the fixed dollar and decimal amount that was adopted 
by the Exchange for FLEX trading. As proposed, the Exchange would allow 
prices for FLEX trading (e.g., exercise price, bids/offers, and minimum 
increments) to be expressed as a percentage of the underlying security 
or index, and limit the percentage increment to be no smaller than 
0.01%. Accordingly, the Exchange proposes to update its FLEX rule 
provisions throughout Options 3A to reflect this enhancement. The 
Exchange believes that the proposed enhancement would provide greater 
flexibility in terms of describing an option contract tailored to the 
needs of the investor.
    Specifically, the exercise price provisions in Options 3A, Section 
3(c)(6) would be amended to provide that the exercise price of a FLEX 
Option may be in increments no smaller than (i) $0.01, if expressed as 
a fixed price in terms of dollars and decimals or a specific index 
value, as applicable, or (ii) 0.01%, if expressed as a percentage of 
the closing value of the underlying equity security or index, as 
applicable, on the trade date (the System rounds the actual exercise 
price to the nearest fixed price minimum increment for bids and offers 
in the class (as set forth in Options 3A, Section 5(a)).\4\ The 
proposed changes in Section 3(c)(6) differentiates between the 
expression of bids and offers of FLEX Options as a fixed price or as a 
percentage of the closing value of the underlying. As described above, 
the Exchange is also proposing to add a parenthetical regarding the 
System rounding the actual exercise price to the nearest fixed price 
minimum increment for bids and offers in the class (as set forth in 
Options 3A, Section 5(a)), which would only be applied to exercise 
prices expressed as a percentage. The dollar value of an exercise price 
expressed as a percentage would be rounded to the nearest minimum 
dollar value increment, which dollar value would represent the 
ultimate, ``actual'' exercise price. For example, suppose a member 
organization enters a percentage bid of 0.27 for a FLEX Equity Option, 
which is the price at which the order for that option ultimately 
trades, and the underlying security has a closing value of 24.52 on the 
trade date. Following the close on the trade date, the System 
calculates the transaction price to be 6.6204 (0.27 x 24.52). Assuming 
the minimum increment for bids and offers in a FLEX Option class is 
$0.01, the System rounds 6.6204 to the nearest penny, which would be a 
transaction price of $6.62. The dollar value of the transaction price 
of a FLEX Option for which the bids and offers were expressed as a 
percentage (the ``final'') determined after the closing value is 
available would be rounded to the nearest fixed price minimum increment 
for the class (e.g., the nearest $0.01, if

[[Page 4678]]

that is the minimum determined for the class).\5\
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    \4\ See Cboe Rule 4.21(b)(6)(A) for materially identical 
provisions.
    \5\ With respect to this example and rounding, if the price was 
$6.625, the System would round to $6.63.
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    The Exchange also proposes to amend Options 3A, Section 4(a) 
(``Units of Trading'') as follows: \6\
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    \6\ See Cboe Rule 5.3(e)(3) for substantially similar 
provisions, except the Exchange will not incorporate Cboe's language 
relating to FLEX Index Options with an index multiplier of one 
(i.e., micro FLEX Index Options) because the Exchange does not offer 
this capability today.
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    (a) Bids and offers for FLEX Options must be expressed in (A) U.S. 
dollars and decimals, if the exercise price for the FLEX Option series 
is a fixed price; or (B) a percentage per unit of the underlying 
security or index, as applicable, if the exercise price for the FLEX 
Option series is a percentage of the closing value of the underlying 
equity security or index on the trade date, each in the applicable 
minimum increment as set forth in Section 5(a) below.
    (1) If the exercise price of a FLEX Option series is a fixed price, 
a bid of ``0.50'' represents a bid of (A) $50 (0.50 times 100 shares) 
for a FLEX Equity Option; and (B) $50 (0.50 times an index multiplier 
of 100) for a FLEX Index Option with a multiplier of 100.
    (2) If the exercise price of a FLEX Option series is a percentage 
of the closing value of the underlying equity security or index, a bid 
of ``0.50'' represents a bid of (A) 50% (0.50 times 100 shares) of the 
closing value of the underlying equity security on the trade date if a 
FLEX Equity Option; and (B) 50% (0.50 times an index multiplier of 100) 
of the closing value of the underlying index on the trade date if a 
FLEX Index Option with a multiplier of 100.
    (3) Following application of the designated percentage to the 
closing value of the underlying security or index, the System rounds 
the final transaction prices to the nearest minimum fixed price 
increment for the class as set forth in Section 5(a) below.
    Like Cboe, the Exchange is making clear with the proposed changes 
in Section 4(a) that bids and offers must be in the same format as the 
exercise price, as it would be difficult to apply a dollar price for a 
FLEX Option series with a percentage-based exercise price. 
Additionally, the proposed changes in Section 4(a) described above add 
examples describing the expression of bids and offers of FLEX Options 
as a fixed price or as a percentage of the closing value of the 
underlying. The proposed changes also specify how the System would 
round the final transaction price once the designated percentage value 
is applied. The changes proposed in Options 3A, Section 4(a) are 
intended to provide a clear, transparent description of how the 
Exchange would apply the fixed price and percentage value methodology 
for FLEX Options, and how the Exchange would round the final 
transaction prices once the designated percentage is applied.
    Further, the Exchange proposes to amend Options 3A, Section 5(a) 
(``Minimum Trading Increments'') to reflect the alternative percentage 
methodology as follows: \7\
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    \7\ See Cboe Rule 5.4(c)(4) for materially identical provisions.
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    The Exchange determines the minimum increment for bids and offers 
on FLEX Options on a class-by-class basis, which may not be smaller 
than (A) $0.01, if the exercise price for the FLEX Option series is a 
fixed price, or (B) 0.01%, if the exercise price for the FLEX Option 
series is a percentage of the closing value of the underlying equity 
security or index on the trade date. Following application of the 
designated percentage to the closing value of the underlying security 
or index, the System rounds the final transaction prices to the nearest 
fixed price minimum increment for the class as set forth in this 
Section 5(a), in each case for the options leg of a FLEX Option.
    The proposed changes in Options 3A, Section 5(a) are similar to 
proposed changes described above for Options 3A, Sections 3(c)(6) and 
4(a), and delineate between the expression of minimum increments for 
bids and offers on FLEX Options as a fixed price or as a percentage of 
the closing value of the underlying. The proposed changes also 
similarly specify how the System would round the final transaction 
price once the designated percentage value is applied.
    The Exchange also proposes to make corresponding changes to its 
FLEX auction rules to reflect that the prices of FLEX Orders \8\ and 
FLEX auction responses submitted into any of the FLEX auctions must be 
expressed either as a fixed dollar price or a percentage, and that such 
price must be in the same format (i.e., fixed dollar price or 
percentage) as the exercise price of the FLEX Option series.
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    \8\ The term ``FLEX Order'' means an order submitted in a FLEX 
Option pursuant to Options 3A. See Options 3A, Section 1(b)(2).
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    Specifically for electronic FLEX Auctions in Options 3A, Section 
11(b), the Exchange proposes in subparagraph (b)(1)(G)(iii) that the 
minimum price increment for a FLEX Order must in the same format (i.e., 
price or percentage) as the exercise price of the FLEX Option 
series.\9\ The Exchange proposes to add a similar requirement in 
subparagraph (b)(2)(D)(vi) with respect to the minimum price increments 
for FLEX responses by stipulating that the minimum price increment for 
FLEX responses is the same as the one the Exchange determines for a 
class pursuant to subparagraph (b)(1)(G) of this Rule, and must be in 
the same format (i.e., price or percentage) as the exercise price of 
the FLEX Option series.\10\ The System rejects a FLEX response that is 
not in the applicable minimum increment or format.\11\ The Exchange 
also proposes to amend the allocation provisions for electronic FLEX 
Auctions in subparagraph (b)(3)(A) to provide that for purposes of 
ranking FLEX responses when determining how to allocate a FLEX Order 
against those responses, the term ``price'' refers to (i) the dollar 
and decimal amount of the response bid or offer or (ii) the percentage 
value of the response bid or offer, as applicable.\12\ The Exchange 
also proposes to amend Options 3A, Section 12(e)(1)(B)(ii) related to 
FLEX PIXL to add rule text that states, ``Member organizations may 
elect for the Initiating Order to have less than their guaranteed 
allocation as described in subparagraph (e)(4) below.'' \13\ The 
Exchange proposes to

[[Page 4679]]

add this sentence as a guidepost and reminder that a member 
organization may elect less than their guaranteed allocation.
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    \9\ Cboe Rules 5.73(a)(5) (governing minimum price increments 
for Cboe's FLEX Automated Improvement Mechanism (``FLEX AIM'')) and 
5.74(a)(5) (governing minimum price increments for Cboe's FLEX 
Solicited Auction Mechanism (``FLEX SAM'')) similarly require that 
the minimum price increment be in the same format (i.e., price or 
percentage) as the exercise price of the FLEX Option series. The 
Exchange notes that Cboe's electronic FLEX Auction in Cboe Rule 
5.72(c), which is the analogue to this particular electronic FLEX 
Auction in Options 3A, Section 11(b), is silent on minimum price 
increments. However, the Exchange will add the minimum price 
increment requirement described above in the rules for its 
electronic FLEX Auction for transparency and clarity.
    \10\ While Cboe's electronic FLEX Auction response requirements 
in Cboe Rule 5.72(c)(2)(D) are silent on minimum increments, the 
auction response requirements for Cboe's FLEX AIM and FLEX SAM in 
Cboe Rules 5.73(c)(5)(A) and 5.74(c)(5)(A), respectively, similarly 
require that the minimum price increment for FLEX AIM and FLEX SAM 
responses must be in the same format (i.e., price or percentage) as 
the exercise price of the FLEX Option series. The Exchange believes 
it will be helpful to add a similar requirement in the rules for the 
Exchange's electronic FLEX Auction responses for transparency and 
clarity.
    \11\ See id.
    \12\ See Cboe Rule 5.72(c)(3)(A) for materially identical 
language.
    \13\ Options 3A, Section 12(e)(4) is related to guaranteed 
allocation. If the Initiating Member selects a single-price 
submission, it may elect for the Initiating Order to have less than 
their guaranteed allocation (50% if there is a response(s) from one 
other member organization or 40% if there are responses from two or 
more member organizations) to trade against the Agency Order. The 
Initiating Member may select a lesser percentage than their 
guaranteed allocation. If the Initiating Member elects 0%, then 
notwithstanding subparagraphs (e)(1) and (2), the System only 
executes the Initiating Order against any remaining Agency Order 
contracts at the stop price after the Agency Order is allocated to 
all FLEX PIXL responses at all prices equal to or better than the 
stop price. Guaranteed allocation information is not available to 
other market participants and may not be modified after it is 
submitted.
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    The Exchange proposes similar changes for FLEX PIXL auctions in 
Options 3A, Section 12. Specifically, the Exchange proposes in 
subparagraph (a)(5)(C) that the price of the Agency Order \14\ and the 
Initiating Order \15\ must be in the same format (i.e., price or 
percentage) as the exercise price of the FLEX Option series.\16\ In 
paragraph (b), the Exchange proposes to provide that the Initiating 
Order must stop the entire Agency Order at a specified price in the 
same format (i.e., price or percentage) as the exercise price of the 
FLEX Option series.\17\ In subparagraph (c)(5)(A), the Exchange 
proposes that the minimum price increment for FLEX PIXL responses shall 
be the same as the Exchange determines for a class pursuant to 
subparagraph (a)(5) of this Rule, and must be in the same format (i.e., 
price or percentage) as the exercise price of the FLEX Option 
series.\18\ The System rejects a FLEX PIXL response that is not in the 
applicable minimum increment or format.\19\ Lastly, in paragraph (e), 
the Exchange proposes that for purposes of ranking the Initiating Order 
and FLEX PIXL responses when determining how to allocate the Agency 
Order against the Initiating Order and those responses, the term 
``price'' refers to (1) the dollar and decimal amount of the order or 
response bid or offer or (2) the percentage value of the order or 
response bid or offer, as applicable.\20\
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    \14\ Pursuant to Options 3A, Section 12, a Member (the 
``Initiating Member'') may electronically submit for execution an 
order (which may be a simple or complex order) it represents as 
agent (``Agency Order'') against principal interest or a solicited 
order(s) (except for an order for the account of any FLEX Market 
Maker with an appointment in the applicable FLEX Option class on the 
Exchange) (an ``Initiating Order''), provided it submits the Agency 
Order for electronic execution into a FLEX PIXL auction pursuant to 
this Rule.
    \15\ See id.
    \16\ See Cboe Rule 5.73(a)(5) for materially identical language.
    \17\ See Cboe Rule 5.73(b) for materially identical language.
    \18\ See Cboe Rule 5.73(c)(5)(A) for materially identical 
language.
    \19\ See id.
    \20\ See Cboe Rule 5.73(e) for materially identical language.
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    Likewise for FLEX SOM auctions in Options 3A, Section 13, the 
Exchange proposes in subparagraph (a)(5)(C) that the price of the 
Agency Order \21\ and the Solicited Order \22\ must be in the same 
format (i.e., price or percentage) as the exercise price of the FLEX 
Option series.\23\ In paragraph (b), the Exchange proposes that the 
Solicited Order must stop the entire Agency Order at a specified price 
in the same format (i.e., price or percentage) as the exercise price of 
the FLEX Option series.\24\ In subparagraph (c)(5)(A), the Exchange 
proposes that the minimum price increment for FLEX SOM responses shall 
be the same increment as the Exchange determines for a class pursuant 
to subparagraph (a)(5) of this Rule, and must be in the same format 
(i.e., price or percentage) as the exercise price of the FLEX Option 
series.\25\ The System rejects a FLEX SOM response that is not in the 
applicable minimum increment or format.\26\ Lastly, the Exchange 
proposes in paragraph (e) that for purposes of ranking the Solicited 
Order and FLEX SOM responses when determining how to allocate the 
Agency Order against the Solicited Order and those responses, the term 
``price'' refers to (1) the dollar and decimal amount of the order or 
response bid or offer or (2) the percentage value of the order or 
response bid or offer, as applicable.\27\
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    \21\ Pursuant to Options 3A, Section 13, a Member (the 
``Initiating Member'') may electronically submit for execution an 
order (which may be a simple or complex order) it represents as 
agent (``Agency Order'') against a solicited order (``Solicited 
Order'') if it submits the Agency Order for electronic execution 
into a FLEX SOM Auction pursuant to this Rule.
    \22\ See id.
    \23\ See Cboe Rule 5.74(a)(5) for materially identical language.
    \24\ See Cboe Rule 5.74(b) for materially identical language.
    \25\ See Cboe Rule 5.74(c)(5)(A) for materially identical 
language.
    \26\ See id.
    \27\ See Cboe Rule 5.74(e) for materially identical language.
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FLEX DAC
    The Exchange proposes to adopt a DAC order instruction that an 
Exchange member organization (``Member'') may apply to a FLEX Order 
when entering it into the System \28\ for execution in a FLEX auction. 
The proposed DAC order instruction is substantially similar to the DAC 
order instruction offered by Cboe.\29\
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    \28\ The term ``System'' means the electronic system operated by 
the Exchange that receives and disseminates quotes, executes orders 
and reports transactions. See Options 1, Section 1(a)(50).
    \29\ See Cboe Rules 5.6(c) (definition of simple DAC order), 
5.33(b)(5) (definition of complex DAC order), 5.34(c)(11) (DAC order 
reasonability check), and 5.70(a)(2) (availability of DAC order 
instruction). See also Securities Exchange Act Release Nos. 90319 
(November 3, 2020), 85 FR 71361 (November 9, 2020) (SR-CBOE-2020-
014) (Order approving DAC order instructions for FLEX ETF and index 
options); and 95707 (September 8, 2022), 87 FR 56477 (September 14, 
2022) (SR-CBOE-2022-036) (Order approving DAC order instructions for 
FLEX equity options).
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    In particular, if a DAC order executes during the trading day, upon 
receipt of the official closing price or value for the underlying from 
the primary listing exchange or index provider, respectively, the 
System will adjust the original execution price of a DAC order based on 
a delta value applied to the change in the underlying reference price 
between the time of execution and the market close. As proposed, DAC 
orders will allow Members the opportunity to incorporate into the 
pricing of their FLEX Options the closing price or the value of the 
underlying on the transaction date based on how much the price or value 
changed during the trading day.
    Near the market close, the Exchange has observed that significant 
numbers of market participants interact in the equity markets, which 
may substantially impact the price or value, as applicable, of the 
underlying at the market close. For example, shares of exchange-traded 
funds (``ETFs'') that track indexes, which are increasingly popular, 
often trade at or near the market close in order to better align with 
the indexes they track and attempt to align the market prices of ETF 
shares as close to the net asset value (``NAV'') \30\ per share as 
possible. Further, the Exchange understands that market makers and 
other liquidity providers seek to balance their books before the market 
close and contribute to increased price discovery surrounding the 
market close. The Exchange also believes it is common for other market 
participants to seek to offset intraday positions and mitigate exposure 
risks based on their predictions of the closing underlying prices or 
underlying indexes (which represent the settlement prices of options on 
those underlyings). The Exchange understands this substantial activity 
near the market close may create wider spreads and increased price 
volatility, which may attract further trading activity from those 
participants seeking arbitrage opportunities and further drive prices.

[[Page 4680]]

In light of the significant liquidity and price/value movements in 
equity shares that can occur near the market close, options closing and 
settlement prices may deviate significantly from options execution 
prices earlier that trading day.
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    \30\ The NAV is an ETF's total assets minus its total 
liabilities. ETFs generally must calculate their NAV at least once 
every business day, and typically do so after market close. See 17 
CFR 270.2a-4.
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    The proposed DAC order instruction is designed to allow investors 
to incorporate any upside market moves that may occur following 
execution of the order up to the market close while limiting downside 
risk. Additionally, the Exchange has noted that there have been a 
number of managed funds that recognize benefits to their investors in 
employing certain strategies that allow for their investors to mitigate 
risk at the market close while also participating in beneficial market 
moves at the close. The proposed DAC order would provide such funds 
with an additional method to attempt to meet their objectives through 
FLEX options strategies, thereby benefitting their investors. The 
Exchange understands that, for example, defined-outcome ETF issuers 
\31\ often times use multi-leg strategy orders when seeding their 
funds. The goal of these strategies is to price the execution of these 
orders at the close of the underlying; however, there is operational 
execution risk in attempting to fill an order late in the day to 
capture the underlying closing price. As such, a DAC complex order 
would allow the Member to execute the order prior to the close and have 
its price adjusted at the close. Because multi-leg strategies 
themselves have delta offsets, the Member is hedged, meaning that the 
Member may realize a negative movement versus the initial execution on 
some legs, which is offset by a positive move in other legs. The 
Exchange notes that the strategies may or may not define an exact delta 
offset (``delta neutrality'' occurs where the strategy defines an exact 
delta offset). Given the delta neutral nature of an order with an exact 
offset, a Member would be indifferent to any movement in the underlying 
from the time of execution to the close. Whether or not a Member 
defines an exact delta offset, a Member would anticipate a given amount 
of market exposure, either partial or none, depending on the strategy 
and combinations of buy/sell, call/put, and quantity. A DAC complex 
order allows the order to be executed anytime, eliminating the 
execution risk, while realizing the objective of pricing based on the 
exact underlying close for those strategies that require pricing at the 
close or a defined amount of market exposure through the close.
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    \31\ The Exchange notes that defined outcome ETF issuers do not 
buy stocks directly, but instead, use options contracts to deliver 
the price gain or loss of an index (such as the S&P 500) over the 
course of a year, up to a preset cap.
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    As stated, the System will adjust the original execution price of a 
DAC order based on a delta value applied to the change in the price of 
the underlying from the time of order execution to the market close. 
Delta is the measure of the change in the option price as it relates to 
a change in the price of the underlying security or value of the 
underlying index, as applicable. The Exchange notes that 1.0000 is the 
equivalent of a 100 delta. For example, an option with a 50 delta 
(which is generally represented as 0.50) would result in the option 
moving $0.50 per $1.00 move in the underlying (i.e., the price in the 
underlying x delta value = anticipated price move in the option). Delta 
changes as the price or value of the underlying stock or index changes 
and as time changes, thus giving a Member an estimation of how an 
option will behave if the price of the underlying moves in either 
direction. Call option deltas are positive (ranging from 0 to 1), 
because as the underlying increases in price so does a call option. 
Conversely, put option deltas are negative (ranging from -1 to 0), 
because as the underlying increases in price the put option decreases 
in price. The Exchange understands that investors use delta as an 
important hedging and risk management tool in options trading. For 
example, by trading an option with a lower delta, an investor's 
underlying position will be exposed to more downside risk if price or 
value of the underlying fall. Therefore, the Exchange believes the 
proposed DAC order instruction will allow a market participant to 
maintain a full hedge of its position taken upon intraday execution of 
a DAC order throughout the remainder of the trading day, which 
ultimately reduces the market participants' portfolio risk.
    The Exchange proposes to make DAC pricing instructions available 
for simple and complex FLEX Orders pursuant to Options 3A, Sections 
6(c) and 7(c), respectively. As proposed, Options 3A, Section 6(c)(1) 
would provide that a DAC order is an order for which the System delta-
adjusts its execution after the market close. Specifically, the delta-
adjusted execution price equals the original execution price plus the 
delta value times the difference between the official closing price or 
value of the underlying on the transaction date and the reference price 
or index value of the underlying (``reference price''). Upon order 
entry for electronic execution, a Member must designate a delta value 
and may designate a reference price. If no reference price is 
designated, the System will include the price or value, as applicable 
of the underlying at the time of order entry as the reference 
price.\32\
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    \32\ See Cboe Rule 5.6(c)(1) and (2) for materially identical 
provisions.
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    Likewise, the proposed definition in Options 3A, Section 7(c)(1) 
provides for essentially the same definition, differing only in that it 
applies to complex FLEX Orders, and upon order entry for electronic 
execution a Member must designate a delta value per leg.\33\
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    \33\ See Cboe Rule 5.33(b)(5)(A) and (B) for materially 
identical provisions.
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    As set forth in proposed Options 3A, Sections 6(c)(2) and 7(c)(2), 
DAC orders and DAC complex orders may only be submitted for execution 
in an electronic FLEX Auction pursuant to Options 3A, Section 11(b), a 
FLEX Price Improvement Mechanism (``FLEX PIXL'') Auction pursuant to 
Options 3A, Section 12, or a FLEX Solicited Order Mechanism (``FLEX 
SOM'') Auction pursuant to Options 3A, Section 13.\34\ As it relates to 
simple DAC orders only, proposed Options 3A, Section 6(c)(2) would also 
provide that a DAC order submitted in a single stock equity option may 
not be submitted until 45 minutes prior to the market close. A DAC 
order may not be submitted in a single stock equity option on its 
expiration day.\35\
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    \34\ Cboe also delineates the submission of DAC orders and DAC 
complex orders in their various FLEX auction mechanisms. See Cboe 
Rules 5.6(c) and 5.33(b)(5) for similar provisions, except the 
Exchange is not proposing to adopt the provisions in Cboe's rules 
related to open outcry as the Exchange does not have a trading 
floor. The Exchange is also not proposing to adopt Cboe's language 
related to designating DAC orders and DAC complex orders as All 
Sessions or RTH and Curb (i.e., order instructions on when certain 
orders are eligible to trade during Cboe's various trading 
sessions). Unlike Cboe, the Exchange does not offer different 
trading sessions and therefore does not offer such order 
instructions.
    \35\ See Cboe Rule 5.6(c) for materially identical provisions.
---------------------------------------------------------------------------

    As a general rule, attempted manipulation of the price of a 
security encounters greater difficulty the more volume that is traded, 
and, generally, single name equity securities tend to be less liquid 
and experience greater price sensitivity and larger market moves than 
indexes or ETPs. The Exchange notes that on expiration day in 
particular, underlying equity securities may experience more price 
sensitivity than on non-expiration days and may be more susceptible to 
incentive to manipulate given that the exercise value of overlying 
options are contingent on the underlying closing price on expiration 
day. Options holders on expiration day, whether their positions

[[Page 4681]]

were taken via a DAC execution or not, are subject to the risk of price 
swings in the underlying prior to the final close; however, options 
holders of positions taken via a DAC execution may potentially be more 
susceptible to such risk given the price adjustment at close. For 
example, if a market participant executes a DAC order to buy calls on 
expiration day and a large price swing follows, in that, the underlying 
price is pushed significantly higher before the close, the DAC option 
holder would be forced to pay a much higher premium upon adjustment, 
and ultimately expiration. Therefore, in order to mitigate the 
potential risk associated with expiration day price swings, which may 
potentially expose DAC order users the gamma effect of options as they 
become more sensitive to underlying price changes as they approach 
expiration, particularly in options overlying less liquid securities, 
the proposed rule change restricts trading (regardless of opening or 
closing) in simple DAC orders in single stock options on expiration 
day. In addition to this, the proposed rule to require simple DAC 
orders in single stock options to be submitted no earlier than 45 
minutes before the market close will reduce the amount of time during 
which the underlying price could potentially move; movements which, as 
stated above, may pose greater risk upon price adjustment at close to 
holders of DAC options. The Exchange notes that the same potential 
incentive to ``push'' the price of the underlying on expiration day in 
connection with the exercise price of an option is greatly diminished 
for multi-leg orders given that parties to multi-leg transactions are 
focused on the spread or ratio between the transaction prices for each 
of the legs (i.e., the net price of the entire complex trade).
    Members will enter into the System all DAC orders as they would any 
other FLEX Order pursuant to Options 3A, Section 11(a) (governing the 
order entry of FLEX Orders) and the applicable FLEX auction rules in 
Options 3A, Sections 11(b), 12, and 13. As such, the Exchange points 
out that DAC orders (like any FLEX Order) may only be submitted in 
permissible FLEX Option series that comply with Options 3A, Section 3. 
As defined above, a Member may designate the reference price of the 
underlying upon submitting a DAC order. The Exchange proposes that a 
Member-designated reference price will be subject to a reasonability 
check. Specifically, proposed Options 3A, Section 14(d) will provide 
that if a Member submits a DAC order to the System with a reference 
price more than an Exchange-determined amount \36\ away from the 
underlying price or value at the time of submission of the DAC order, 
the System rejects the order.\37\ Moreover, if a Member chooses to 
submit a DAC order without a reference price, the System will 
automatically input the price or value of the underlying at the time of 
order entry as the reference price.
---------------------------------------------------------------------------

    \36\ The Exchange will review market activity to determine the 
Exchange-determined amount and, thereafter, amend that amount from 
time-to-time. The Exchange will disclose the amount on its web page 
at: <a href="https://www.nasdaq.com/docs/PHLXSystemSettings">https://www.nasdaq.com/docs/PHLXSystemSettings</a>.
    \37\ The System will use the most recent last sale (or 
disseminated index value) as the reference price. See Cboe Rule 
5.34(c)(11) for materially identical provisions.
---------------------------------------------------------------------------

    As set forth in proposed Options 3A, Sections 6(c)(1) and 7(c)(1), 
for a DAC order submitted into a FLEX electronic auction, a Member will 
be required to designate a delta value upon order entry (including for 
each leg of a DAC complex order). As noted above, delta is either 
between 0 and 1 for calls, and 0 and -1 for puts.\38\ The Exchange 
notes that 1.0000 is the equivalent of a 100 delta. Pursuant to the 
general principles by which deltas function, the delta for a call 
options leg(s) must be greater than zero and the delta for a put 
options leg(s) must be less than zero. Additionally, the delta for call 
(put) legs must be less (greater) than or equal to the delta for the 
adjacent call (put) leg (i.e., the leg with the next largest strike 
price) of the same expiration as the strike price increases. This is 
also consistent with the general manner in which deltas function, and 
ensures that the deltas on the same leg type within the same expiration 
trend away from zero as the strike value increases.
---------------------------------------------------------------------------

    \38\ Note the Exchange will permit delta values to be input up 
to four decimals, as prices for the underlying securities and index 
values may be expressed in four decimals. However, bids and offers 
may only be input in accordance with Options 3A, Section 5, which 
bids and offers the System will use to rank and allocate orders and 
auction responses.
---------------------------------------------------------------------------

    Typically, a Member submits a complex order (including a DAC 
complex order, as proposed) with a net price, and, for a complex FLEX 
Order, a Member must include a price for each leg upon electronic 
submission.\39\ Therefore, upon electronic submission a Member must 
also designate a delta value per leg along with the leg prices. At 
market close, the System will then be able to apply the delta value per 
each of the leg prices to properly calculate the DAC by adjusting the 
execution price of each leg.
---------------------------------------------------------------------------

    \39\ See Options 3A, Section 11(a)(2)(B).
---------------------------------------------------------------------------

    A Member may apply the DAC order instruction (which must be a value 
greater than 0) to a FLEX Order submitted into an electronic FLEX 
Auction pursuant to Options 3A, Section 11(b), FLEX PIXL Auction 
pursuant to Options 3A, Section 12, or FLEX SOM Auction pursuant to 
Options 3A, Section 13. A DAC order will be handled and executed in the 
FLEX auctions in the same manner as any other FLEX Order pursuant to 
the applicable FLEX auction rules, including pricing, priority, and 
allocation rules.\40\ The Exchange also notes that DAC orders submitted 
to the Exchange will have unique message characteristics, indicative 
that the order is a DAC order. Therefore, contra-side interest will be 
aware of the specific order type and may then choose whether or not 
they wish to interact with DAC orders.
---------------------------------------------------------------------------

    \40\ See Options 3A, Sections 11(b), 12, and 13.
---------------------------------------------------------------------------

    Pursuant to Options 3A, Section 11(a), FLEX Orders (including 
proposed DAC orders) may only be submitted for execution in an 
electronic FLEX Auction, FLEX PIXL Auction, and FLEX SOM Auction. As 
such, the Exchange believes it is appropriate for DAC orders to only 
execute in FLEX auctions. The delta and reference price appended to a 
DAC order would be based on data regarding the underlying at the time 
of order entry. As those values change as the price or value of the 
underlying change, the reference price and delta at the time of 
submission would achieve the desired delta-adjusted price result only 
if the DAC order executes almost immediately upon submission. To allow 
a DAC order to potentially execute after a significant amount of time 
has passed since entry, underlying price and related delta at the time 
a DAC order would eventually execute would be different and thus not 
achieve the Member's desired result. If a DAC order executes in an 
auction, it will do so within a short time following submission. 
Indeed, the Exchange's FLEX auctions last for a defined period, the 
length of which is between three seconds to five minutes as designated 
by the submitting Member.\41\ As such, the Exchange believes that the 
execution of DAC orders in FLEX auctions is consistent with the 
intended purpose of a DAC order.
---------------------------------------------------------------------------

    \41\ See Options 3A, Sections 11(b)(1)(F), 12(c)(3), and 
13(c)(3).
---------------------------------------------------------------------------

    For any DAC order that executes during a trading day, upon receipt 
of the official closing price for the underlying from the primary 
listing exchange or index provider, the System will adjust the original 
execution price based on the delta applied to the absolute change in 
the underlying between the time of

[[Page 4682]]

execution and the market close. The Exchange notes that, like the 
execution price of any option, a delta-adjusted price may never be zero 
or negative. If this occurs as a result of the DAC calculation, the 
System will set the delta-adjusted price to the minimum permissible 
increment.
    The delta adjustment formula that will be applied at the close will 
be as follows:

    The delta-adjusted price = the original execution price + (the 
change in the underlying price x delta) or P2 = P1 + (U-R) * D,

where:

<bullet> P1 = Original execution price
<bullet> P2 = Delta-adjusted price calculated at the close
<bullet> R = Reference price
<bullet> U = Price of the underlying at the market close
<bullet> D = Delta

    Example 1: A DAC call order is submitted for execution in an 
electronic FLEX auction and the price of the underlying increases from 
the time of the execution to the market close.

<bullet> P1 = $1.00
<bullet> R = $100
<bullet> U = $101.00
<bullet> D = .4000

    Therefore, P2 = $1.00 + (($101-$100) * .4000) = $1.40.
    Example 2: A DAC put order in a penny increment is submitted for 
execution in a FLEX auction and the price of the underlying increases 
from the time of execution to the market close.

<bullet> P1 = $1.00
<bullet> R = $100
<bullet> U = $103.00
<bullet> D = -.4000

    Therefore, P2 = $1.00 + (($103--$100) * -.4000) = -$0.20. However, 
because an execution price, including a delta-adjusted execution price, 
may not be negative, the System would adjust P2 = $0.01 (the minimum 
permissible increment).
    Example 3: A DAC complex order has two legs, where leg 1 is buy 
call and leg 2 is buy put (straddle).
Leg 1
<bullet> P1 = $18.00
<bullet> R = $2875.00
<bullet> U = $2878.00
<bullet> D = .5000

    Therefore, P2 = ($18.00 + (($2878-$2875) * .5000) = $19.50
Leg 2
<bullet> P1 = $42.00
<bullet> R = $2875.00
<bullet> U = $2878.00
<bullet> D = -.5000

    Therefore, P2 = ($42.00 + (($2878-$2875) * -.5000) = $40.50.
    As described above, the Member would be indifferent to the move in 
the underlying due to the offsetting nature of the two legs. The 
initial execution price for the DAC complex order (P1) would be $18.00 
+ $42.00 = $60.00, and the adjusted price calculated at the close (P2) 
for the DAC complex order would be $19.50 + $40.50 = $60.00. As a 
result, the Member in this Example 3 would be able to execute a hedged 
strategy earlier in the trading day and have it priced exactly in line 
with the underlying close without incurring any market risk or 
operational risk of trying to time the execution exactly at the close.
    Example 4: A defined outcome ETF uses a simple buffer protect 
strategy in connection with a seed trade. The Member buys the at the 
money put and sells the 10% out of the money put while selling the 5% 
out of the money call.
    Leg 1: Buy SPX May 2875 put at $69.00 with 50 delta.

<bullet> P1 = $69.00
<bullet> R = $2875.00
<bullet> U = $2878.00
<bullet> D = -.5000

    Therefore, P2 = ($69.00 + (($2878-$2875) * -.5000) = $67.50.
    Leg 2: Sell SPX May 2590 put at $15.00 with 12 delta.

<bullet> P1 = $15.00
<bullet> R = $2875.00
<bullet> U = $2878.00
<bullet> D = -.1200

    Therefore, P2 = ($15.00 + (($2878-$2875) * -.1200) = $14.64.
    Leg 3: Sell SPX May 3020 call at $11.50 with 16 Delta.

<bullet> P1 = $11.50
<bullet> R = $2875.00
<bullet> U = $2878.00
<bullet> D = .1600

    Therefore, P2 = ($11.50 + (($2878-$2875) * .1600) = $11.98.
    The initial execution price for the order would be $69.00-$15.00-
$11.50 = $42.50. The adjusted execution price would be $67.50-$14.64-
$11.98 = $40.88. The strategy would have an overall delta of -.46 
(-.5000 + -.1200 +.16). As a result, the fund would be seeded exactly 
at the closing price with exactly the delta exposure defined by the 
strategy, without incurring any operational execution risk. The Member 
would be able to execute a hedged strategy earlier in the trading day 
and have it priced exactly in line with the underlying close without 
incurring any unanticipated market risk or operational risk of trying 
to time the execution exactly at the close.
    A Member may only apply the DAC order instruction to a FLEX Order 
for a FLEX Option series with an exercise price expressed as a fixed 
price in dollars and decimals. The proposed changes in Options 3A, 
Sections 6(c) and 7(c) will therefore provide that the Exchange may 
determine to make DAC orders and DAC complex orders available for FLEX 
trading, except for FLEX Options with an exercise price that is a 
percentage of the closing value of the underlying equity security or 
index value, as applicable on the trade date.\42\ A Member may not 
apply the DAC order instruction to a FLEX Order for a FLEX Options 
series with an exercise price formatted as a percentage of the closing 
value of the underlying on the trade date, as this functionality is not 
compatible with the DAC order instruction. The System will need a fixed 
execution price at the time of order execution that will be delta-
adjusted (which delta value is based on dollar price movements in the 
underlying) following the market close. However, a FLEX Order for a 
series with an exercise price formatted as a percentage of the closing 
value will execute at a percentage rather than a fixed price, which 
would not be determined until the market close. Therefore, the 
execution price of such a FLEX Order will incorporate the closing price 
or value of the underlying in a different manner, and the System would 
not have an execution price to adjust.
---------------------------------------------------------------------------

    \42\ This proposed limitation in Options 3A, Sections 6(c) and 
7(c) is substantially similar to the limitation currently in Cboe 
Rule 5.70(a)(2), except the Exchange will not adopt Cboe's 
limitation on Asian- and Cliquet-settled FLEX Options. The Exchange 
does not offer those settlement types today.
---------------------------------------------------------------------------

    Similar to Cboe, the reference price and delta value, as well as 
the execution price, will be provided to all transaction parties on all 
fill reports at the time of the execution of a DAC order (i.e., an 
``unadjusted DAC trade''). Unadjusted DAC trade information will also 
be sent to the Options Clearing Corporation (``OCC'') and disseminated 
to the Options Price Reporting Agency (``OPRA''). Specifically for FLEX 
DAC orders, like for all FLEX Orders, trade information will be 
reported via a text message to OPRA.
    The Exchange notes that the text message for FLEX DAC orders will 
contain an indicator that the order was executed as DAC, as well as the 
delta and the reference price. The Exchange also notes that individual 
legs of a FLEX DAC complex order will be reported with an identifier 
that they are part of a complex order just like any complex order legs 
are reported today. Initial

[[Page 4683]]

execution will be reported to OPRA as a FLEX text message and will 
include a DAC identifier, delta value and reference price. The adjusted 
DAC price will be reported to OPRA as a price correction similar to any 
other adjusted trade, and will include a cancel for the initial 
execution followed by a new trade containing the adjusted price. At 
Market Close, when the execution price is delta-adjusted, all 
transaction parties will be sent the adjusted prices. Finally, the 
delta-adjusted price will also be sent to the OCC and OPRA once the 
restatement process is complete. The prior unadjusted DAC trade report 
that was sent to the OCC and disseminated to OPRA will be cancelled and 
replaced with a trade report reflecting the delta-adjusted execution 
price.\43\
---------------------------------------------------------------------------

    \43\ The Exchange notes that this restatement process is the 
same for an order that has been adjusted or nullified and 
subsequently restated pursuant to the Exchange's obvious error 
rules. See Options 3, Section 20.
---------------------------------------------------------------------------

    The Exchange has analyzed its capacity and believes the Exchange 
has the necessary systems capacity to handle additional order traffic 
and the associated restatements that may result from the adoption of 
DAC orders. The Exchange also has consulted with OPRA and understands 
that they have the necessary system capacity as well. Further, the 
Exchange represents it has an adequate surveillance program in place to 
monitor orders with DAC pricing and that the proposed pricing 
instruction will not have an adverse impact on surveillance capacity. 
Also, the Exchange does not believe the proposed order instruction will 
have any impact on pricing or price discovery at or near the market 
close. A DAC order will execute intraday in the same manner as any 
other order, and its price will merely be automatically adjusted 
following determination of the final closing price or value of the 
underlying security or index, respectively.
FLEX v. Non-FLEX
    FLEX Options are customized equity or index option contracts that 
allow investors to tailor contract terms for exchange-listed equity and 
index options. The Exchange may make simple FLEX Orders and complex 
FLEX Orders pursuant to Options 3A, Section 3, available for FLEX 
trading. Currently, the legs of a Complex FLEX Order are limited to 
FLEX Option series only. An investor wishing to trade a complex 
strategy containing both FLEX Option series and non-FLEX Option series 
must execute such strategy using two or more separate orders.
    At this time, the Exchange proposes to amend its rules to allow for 
the legs of a complex FLEX Order to include a combination of FLEX 
Option series and non-FLEX Option series (``FLEX v. Non-FLEX Order'') 
identical to Cboe's rules.\44\ The Exchange notes that, with exception 
of the rules proposed in this rule filing, FLEX v. Non-FLEX Orders will 
be subject to the same trading rules and procedures that currently 
govern the trading of other Complex FLEX Orders on the Exchange. To 
permit the trading of FLEX v. Non-FLEX Orders, the Exchange proposes to 
amend its rules as follows.
---------------------------------------------------------------------------

    \44\ See Securities Exchange Act Release No. 102297 (January 28, 
2025), 90 FR 8822 (February 3, 2025) (SR-Cboe-2024-047) (Notice of 
Filing of Amendment No. 2 and Order Granting Accelerated Approval of 
a Proposed Rule Change, as Modified by Amendment No. 2, Regarding 
the Types of Complex Orders Available for Flexible Exchange Options 
(``FLEX'') Trading on the Exchange).
---------------------------------------------------------------------------

    The Exchange proposes to add FLEX v. Non-FLEX Orders to the types 
of complex orders available for FLEX trading.\45\ The proposed rule 
text is substantially similar to Cboe Rule 5.70(b) and (e).\46\
---------------------------------------------------------------------------

    \45\ Complex orders, including a Complex Options Order, Stock-
Options Order, and Stock-Complex Order are each as defined in 
Options 3, Section 14(a)).
    \46\ The Exchange is not adopting language similar to Cboe 
5.70(d) which states that in classes determined by the Exchange, a 
nonconforming FLEX v. Non-FLEX Order is not eligible for electronic 
processing, in which case the nonconforming FLEX v. Non-FLEX Order 
may only be submitted for manual handling and open outcry trading. 
On Phlx, a nonconforming FLEX v. Non-FLEX Order would be eligible 
for electronic processing.
---------------------------------------------------------------------------

    As part of the proposed changes, the Exchange proposes to add a 
``FLEX Option series'' as a defined term in Options 3, Section 3, FLEX 
Option Listing, at paragraph (b). Further, to enhance comprehension, 
the Exchange proposes to amend Options 3A, Section 3(b)(2) to add the 
word ``new'' before FLEX Options series for clarity.
    Next, the Exchange proposes to amend Options 3A, Section 7, Complex 
Orders. Specifically, the Exchange proposes to amend Options 3A, 
Section 7(a) to state that the legs of a Complex FLEX Order may be for 
FLEX Option series only or a combination of FLEX Option series and non-
FLEX Option series (``FLEX v. Non-FLEX Order'').\47\ As noted above, 
FLEX v. Non-FLEX Orders will be considered complex FLEX instruments, 
which will be subject to the same trading rules and procedures that 
govern the trading of other FLEX Orders on the Exchange (unless 
otherwise noted herein). The Exchange also proposes to amend Options 
3A, Section 7(a) to remove the requirements set forth in subparagraphs 
(1) and (2). Options 3, Section 7(a) provides that each leg(s) of a 
Complex FLEX Order must be for a FLEX Option series authorized for FLEX 
trading with the same underlying equity security or index. The Exchange 
proposes to delete this requirement, as such requirement is already 
contained within the definition of a Complex Options Strategy in 
Options 3, Section 14(a)(1), a Stock-Options Strategy in Options 3, 
Section 14(a)(2) and a Stock-Complex Strategy in Options 3A, Section 
14(a)(3). Options 3A, Section 7(a)(2) provides that each leg(s) of a 
Complex FLEX Order must have the same exercise style. The Exchange 
proposes to delete this requirement to allow for the trading of the 
proposed FLEX v. Non-FLEX Orders and will, in general, provide FLEX 
Traders with more flexibility and opportunities for customization via 
FLEX trading. Further, deletion of this requirement that each leg of a 
Complex FLEX Order (whether comprised of all FLEX Option legs or FLEX 
and non-FLEX Option legs) must have the same exercise style will expand 
investors' choices and flexibility, and provide FLEX Traders with a 
mechanism by which to manage the positions and associated risk in their 
portfolios more precisely, based on exercise style.\48\ As amended, 
Options 3A, Section 7(a)(1) and (2) are being deleted and Options 3A, 
Section 7(a)(3) is being amended to provide that for an Index Option, 
each leg may have a different settlement type (a.m.-settled or p.m.-
settled). Also, Options 3A, Section 7(a)(3) is being renumbered as 
7(a)(1).
---------------------------------------------------------------------------

    \47\ Under the proposed rule change, Complex FLEX Orders could 
include both listed instruments as well as FLEX instruments (if at 
least one leg is for a FLEX Option series), with an optional stock 
leg. Per the definition of complex order, the legs of all complex 
FLEX Orders (including FLEX v. Non-FLEX options) must have the same 
underlying security or index. See Options 3A, Section 7(a)(1).
    \48\ This rule text is identical to Cboe Rule 5.70(b).
---------------------------------------------------------------------------

    The Exchange also proposes to add rule text at Options 3A, Section 
7(d) that provides that the non-FLEX Option leg(s) of a FLEX v. Non-
FLEX Order may not Leg into the simple order book. The Exchange 
believes that this amendment will provide for more efficient execution 
and processing of FLEX v. Non-FLEX Orders.
    Today, FLEX and Non-FLEX Order are subject to different trading 
settings and parameters (e.g., allocation, entitlements) pursuant to 
their respective Rules. Non-FLEX Orders have separate market data 
inputs, as the System must read market data for each options class in 
connection with potential executions in non-FLEX options classes. If 
the System receives a FLEX v. Non-FLEX Order, it would need to trade 
the Non-FLEX leg against the

[[Page 4684]]

appropriate leg in the respective order book (FLEX Order Book vs. Non-
FLEX Order Book). This is because execution opportunities for FLEX v. 
Non-FLEX Orders may be prevented. For example, if the Non-FLEX leg(s) 
of the FLEX v. Non-FLEX Order would execute against interest in the 
standard order book, there would be no execution opportunities for the 
FLEX leg(s) of the FLEX v. Non-FLEX Order. As discussed below, the Non-
FLEX legs of FLEX v. Non-FLEX Orders will protect Priority Customer 
orders in the simple order book for the Non-FLEX classes.
    The Exchange proposes to amend Options 3A, Section 9, Trading 
Halts. Identical to Cboe Rule 4.21(a)(4), the Exchange proposes a new 
subparagraph (b) that states that the Exchange may halt trading in a 
FLEX Options complex strategy (whether comprised of all FLEX Option 
legs or FLEX and non-FLEX Option legs) if any leg of the strategy is 
halted. Further, the System does not accept a Complex FLEX Order for a 
series while trading in the class is halted. A FLEX Options complex 
strategy may not execute until all legs are no longer halted.
    The Exchange proposes to amend Options 3, Section 11, FLEX Options 
Trading, to distinguish criteria for a complex order with only FLEX 
Option legs and to add criteria for FLEX and non-FLEX Option legs of a 
FLEX v. Non-FLEX Order similar to Cboe Rule 5.70. First, the Exchange 
proposes to amend Options 3A, Section 11(a)(2) to specify that each 
FLEX Option leg of the FLEX Option complex strategy must include all 
terms for a FLEX Option series set forth in Options 3A, Section 3 
(including that a non-FLEX Option series with identical terms is not 
listed for trading), subject to the order entry requirements set forth 
in Options 3A, Section 11.\49\
---------------------------------------------------------------------------

    \49\ This rule text is identical to Cboe Rule 5.72(b)(2).
---------------------------------------------------------------------------

    Additionally, the Exchange proposes changes to distinguish the 
criteria for a complex order with only FLEX Option leg(s) from that 
proposed for FLEX v. Non-FLEX Orders, noting that there are no changes 
to the criteria to those FLEX Orders containing only FLEX Option leg(s) 
as a result of the proposed rule change other than removing the 
requirement that all legs must have the same exercise style. The 
Exchange proposes to amend Options 3A, Section 11(a)(2) to add a new 
(B) titled ``FLEX Options Legs Only.'' The Exchange proposes to amend 
the existing rule text in current Options 3A, Section 11(a)(2)(B) to 
add ``with only FLEX legs'' and re-letter this section as Options 3A, 
Section 11(a)(2)(B)(i).\50\
---------------------------------------------------------------------------

    \50\ Cboe Rule 5.72(b)(2)(A) distinguishes electronic FLEX 
trading from open outcry FLEX trading for FLEX Options Legs. ISE 
does not have a trading floor so that distinction is not necessary.
---------------------------------------------------------------------------

    Next, the Exchange proposes to add a new Options 3A, Section 
11(a)(2)(C) to provide the requirements for a complex FLEX Order with 
only FLEX Option legs submitted into the System for an electronic FLEX 
Auction pursuant to paragraph (b) below, a FLEX PIXL pursuant to 
Section 12 below, or a FLEX SOM pursuant to Section 13, which must 
include a bid or offer price for each FLEX Option leg but no bid or 
offer price for each non-FLEX Option leg, and a net price. Proposed 
Options 3A, Section 11(a)(2)(C)(i) would note that to achieve the 
desired net execution price for a FLEX v. Non-FLEX Order: the execution 
price of each non-FLEX Option leg may not be worse than the NBBO, worse 
than the BBO, or equal to the BBO if there is a Priority Customer 
order(s) on the simple order book. This requirement along with proposed 
Options 3A, Section 11(a)(2)(C)(ii) are together required to achieve 
the desired net execution price for a FLEX v. Non-FLEX Order. Proposed 
Options 3A, Section 11(a)(2)(C)(ii) notes that the execution price of 
each FLEX Option leg(s) may be adjusted so that the prices of the FLEX 
legs combined with the prices of the non-FLEX legs add together to 
equal the net price.\51\
---------------------------------------------------------------------------

    \51\ This rule text is identical to Cboe Rule 5.72(b)(2)(B).
---------------------------------------------------------------------------

    Thus, the non-FLEX Option legs of a FLEX v. Non-FLEX Order would be 
able to trade at the same price as non-Priority Customer interest at 
the BBO, which is consistent with complex orders comprised of solely 
non-FLEX Options.\52\ In addition, no non-FLEX component of a FLEX v. 
Non-FLEX Order would be able to trade at the same price as resting 
Priority Customer interest at the BBO.\53\ If a non-FLEX Option leg of 
a FLEX v. Non-FLEX Order cannot execute at a price permissible that 
meets the requirements set forth in proposed Options 3A, Section 
11(a)(2)(C)(i) the entire FLEX v. Non-FLEX Order will be cancelled.
---------------------------------------------------------------------------

    \52\ See Cboe Rule 5.33(f)(2)(A)(ii).
    \53\ See proposed Options 3A, Section 11(a)(2)(C)(i).
---------------------------------------------------------------------------

    The below examples are designed to illustrate the pricing of a FLEX 
v. Non-FLEX Order. Assume for each example a FLEX Trader wishes to 
execute a Complex FLEX Order with two legs (one FLEX Option leg and one 
non-FLEX Option leg).

Example 1

    Listed (i.e., non-FLEX) legs are adjusted to their NBBO, FLEX 
Option leg is adjusted residually to meet net execution price.

--------------------------------------------------------------------------------------------------------------------------------------------------------
         Instrument ID                  Legs                 Symbol                 Side            Ratio        Expiration        Strike       Type
--------------------------------------------------------------------------------------------------------------------------------------------------------
CI0001........................  Leg 1...............  XYZ.................  Buy.................         1  December............        10  Call.
                                Leg 2...............  1 XYZ...............  Sell................         1  November............     10.01  Call.
--------------------------------------------------------------------------------------------------------------------------------------------------------

Market for Non-FLEX Leg
Away BBO: 2.15 x 2.35
BBO: 2.20 x 2.30
NBBO: 2.20 x 2.30
FLEX Order Auction (``FOA''): Buy 10 CI0001 @1.25
Leg 1 (Non-FLEX Option Leg) Price: N/A
Leg 1 Market: (Exchange Market-Maker) 2.20 x 2.30 (Exchange Market-
Maker) Leg 2 (FLEX Option Leg) Price: 1.00
Response 1: Sell 5 CI0001 @1.19
Response 2: Sell 5 CI0001 @1.25

    FOA trades 5 CI0001 with Response 1 at 1.19. The legs print at 2.20 
and 1.01.\54\
---------------------------------------------------------------------------

    \54\ In this example, the Leg 1 market is 2.2x 2.30; the System 
would ensure that the Exchange does not trade through this market. 
The transaction price is $1.19 (Response 1). With a Leg 2 price of 
$1.00, Leg 1 would have to trade at $2.19, however, because this 
would be outside the NBBO, Leg 1 will execute at $2.20. As a result, 
Leg 2 would have to be adjusted to as close to the stipulated price 
of $1.00 as possible--$1.01. The final transaction would price Leg 1 
at $2.20 and Leg 2 at $1.01 for a next price of $1.19 (Response 1).
---------------------------------------------------------------------------

    FOA trades 5 CI0001 with Response 2 at 1.25. The legs print at 2.25 
and 1.00.\55\
---------------------------------------------------------------------------

    \55\ In this example, the net price is $1.25, and the market for 
Leg 1 is $2.20 x $2.30. The System cannot print Leg 2 at the 
stipulated price of $1.00 because it would trade through. The 
transaction price is $1.25 (Response 2). With a Leg 2 price of 
$1.00, Leg 1 would have to trade at $2.25. Leg 1 is able to execute 
at $2.25 since this is between the NBBO and Leg 2 would be allowed 
to execute t $1.00. The final transaction would price Leg 1 at $2.25 
and Leg 2 at $1.00 for a next price of $1.25 (Response 2).
---------------------------------------------------------------------------

Example 2
    Listed (i.e., Non-FLEX) legs are adjusted up/down to their NBBO, 
FLEX Option leg retains specified price, as no

[[Page 4685]]

further adjustment is needed to meet net price.

--------------------------------------------------------------------------------------------------------------------------------------------------------
         Instrument ID                  Legs                 Symbol                 Side            Ratio        Expiration        Strike       Type
--------------------------------------------------------------------------------------------------------------------------------------------------------
CI0001........................  Leg 1...............  XYZ.................  Buy.................         1  December............        10  Call.
                                Leg 2...............  1 XYZ...............  Sell................         1  November............     10.01  Call.
--------------------------------------------------------------------------------------------------------------------------------------------------------

Market for Non-FLEX Leg
Away BBO: 2.10 x 2.35
BBO: 2.15 x 2.30
NBBO: 2.15 x 2.30
FOA: Buy 10 CI0001 @1.25.
Leg 1 (Non-FLEX Option Leg) Price: N/A
Leg 1 Market: (Exchange Market-Maker) 2.15 x 2.30 (Exchange Market-
Maker) Leg 2 (FLEX Option Leg) Price: 1.00
Response 1: Sell 5 CI0001 @1.19
Response 2: Sell 5 CI0001 @1.25

    FOA trades 5 CI0001 with Response 1 at 1.19. The legs print at 2.19 
and 1.00.\56\ FOA trades 5 CI0001 with Response 2 at 1.25. The legs 
print at 2.25 and 1.00.\57\
---------------------------------------------------------------------------

    \56\ In this example, the Leg 1 market is $2.15 x $2.30; the 
System would ensure that the Exchange does not trade through this 
market. The transaction price is $1.19 (Response 2). With a Leg 2 
price of $1.00, Leg 1 would have to trade at $2.19 because this 
would be inside the NBBO, Leg 1 will execute at $2.19. Therefore, 
Leg 2 would not have to be adjusted and would execute at $1.00. The 
final transaction would price Leg 1 at $2.19 and Leg 2 at $1.00.
    \57\ In this example, the price is $1.25, and the market for Leg 
1 is $2.15 x $2.30. The next transaction price is $1.25 (Response 
2). With a Leg 2 price of $1.00, Leg 1 would have to trade at $2.25 
and because this would be inside the NBBO, Leg 1 will execute at 
$2.25. Therefore, Leg 2 would not have to be adjusted and would 
execute at $1.00. The final transaction would price Leg 1 at $2.25 
and Leg 2 at $1.00.
---------------------------------------------------------------------------

    While the System followed the same process in both examples, 
because the leg market was wider in the second example, the System was 
able to execute the non-FLEX leg in that example at a price within that 
market without the need to adjust the entered price of the FLEX leg.
    Finally, the Exchange proposes to adopt a new Options 3A, Section 
20 titled ``Nullification and Adjustment of Options Transactions 
including Obvious Errors.'' Today, obvious errors related to complex 
orders are described in Supplementary .05 to Options 3, Section 20. The 
Exchange proposes to provide in this new section that in addition to 
the language in Supplementary .05 to Options 3, Section 20, the 
following paragraph will apply as it relates to FLEX Orders.
    Specifically, the Exchange proposes to add rule text to this new 
Options 3A, Section 20 to state that if a non-FLEX Option leg of a FLEX 
v. Non-FLEX Order qualifies as an Obvious Error under Options 3, 
Section 20(c)(1) or a Catastrophic Error under Options 3, Section 
20(d)(1), then the non-FLEX Option leg that is an Obvious or 
Catastrophic Error will be adjusted in accordance with Options 3, 
Section 20(c)(4)(A) or (d)(3), respectively, regardless of whether one 
of the parties is a Customer. However, the non-FLEX Option leg of any 
Customer order subject to proposed paragraph (a) of Options 3A, Section 
20 will be nullified if the adjustment would result in an execution 
price higher (for buy transactions) or lower (for sell transactions) 
than the Customer's net execution price for the non-FLEX Option leg. If 
any leg of a FLEX v. Non-FLEX Order is nullified, the entire 
transaction is nullified. This is consistent with the Exchange's 
handling of other complex orders, including stock-option orders, and 
ensures protections in the event of an Obvious or Catastrophic error. 
The below example is designed to illustrate how a FLEX v. Non-FLEX 
Order will be processed in the event of an Obvious Error. Assume in the 
example that a FLEX Trader wishes to execute a Complex FLEX Order with 
three legs (one FLEX Option leg and two non-FLEX Option leg).
Example 3: Listed Leg 1 Qualifies as Obvious Error
Leg 1: Buy 1 Call 1.00 x 1.20
Leg 2: Buy 1 Call 2.00 x 2.25
Leg 3: Buy 1 FLEX Call (Note: the FLEX leg is not considered in 
determining obvious error adjustments)
cNBBO \58\ of listed legs: 3.00 x 3.45
---------------------------------------------------------------------------

    \58\ The term ``cNBBO'' means the best net debit or credit price 
for a Complex Order Strategy based on the NBBO for the individual 
options components of a Complex Order Strategy, and, where the 
underlying security is a component of the Complex Order, the 
National Best Bid and/or Offer for the underlying security. See 
Options 3, Section 14(a)(vi).
---------------------------------------------------------------------------

Assume Leg 1 updates to 1.00 x 4.00; Listed Leg cNBBO updates to 3.00 x 
6.25
1 millisecond later
Complex Order trades at 5.45
Leg 1 trades @2.25
Leg 2 trades @2.20

    FLEX leg trades @1.00. This order, specifically the execution on 
Leg 1, qualifies as Obvious Error, based on prices prior to Leg 1 
market going wide.\59\ In this example the prior market was $1.00 x 
$1.20 before the market widened and Leg 1 traded at $2.25, therefore 
this qualifies as Obvious Error.
---------------------------------------------------------------------------

    \59\ See proposed paragraph (a) of Options 3A, Section 20. See 
also Options 3, Section 20(c)(1). An Obvious Error will be deemed to 
have occurred when the Exchange receives a properly submitted filing 
where the execution price of a transaction is higher or lower than 
the Theoretical Price for the series by an amount equal to at least 
the amount shown in a table at Options 3, Section 20(c)(1).
---------------------------------------------------------------------------

    Obvious error adjustment: Leg 1 is adjusted to trade at 1.60.

Theoretical Price \60\ (``TP'') = 1.10 \61\
---------------------------------------------------------------------------

    \60\ Upon receipt of a request for review and prior to any 
review of a transaction execution price, the ``Theoretical Price'' 
for the option must be determined. If the applicable option series 
is traded on at least one other options exchange, then the 
Theoretical Price of an option series is the last NBB just prior to 
the trade in question with respect to an erroneous sell transaction 
or the last NBO just prior to the trade in question with respect to 
an erroneous buy transaction unless one of the exceptions in 
subparagraphs (b)(1) through (3) below exists. For purposes of this 
provision, when a single order received by the Exchange is executed 
at multiple price levels, the last NBB and last NBO just prior to 
the trade in question would be the last NBB and last NBO just prior 
to Exchange's receipt of the order. See Options 3, Section 20(b).
    \61\ The Theoretical Price is 1.10 because it is the midpoint 
between the market (1.00 x 1.20).
---------------------------------------------------------------------------

theoretical offer \62\ = 1.45
---------------------------------------------------------------------------

    \62\ The theoretical offer shown above represents the offer for 
purposes of this example.
---------------------------------------------------------------------------

theoretical offer (1.45) + 0.15 adjustment \63\ = 1.60.
---------------------------------------------------------------------------

    \63\ See proposed paragraph (a) of Options 3A, Section 20. See 
also Options 3, Section 20(c)(4)(A). Where neither party to the 
transaction is a Customer, the execution price of the transaction 
will be adjusted by the Official pursuant to the table at Options 3, 
Section 20(c)(4)(A). Any non-Customer Obvious Error exceeding 50 
contracts will be subject to the Size Adjustment Modifier defined in 
sub-paragraph (a)(4) of Options 3, Section 20. For purposes of this 
Rule, an Official is an Options Exchange Official as defined in 
Options 1, Section 1(b)(38).

The Exchanges notes that the counterparties to an execution of a FLEX 
v. Non-FLEX Order trade all of the component legs of the order.
    The Exchange believes that its existing surveillance and reporting 
safeguards in place are adequate to deter and detect possible 
manipulative behavior which might arise from trading FLEX v. Non-FLEX 
Orders and will support the protection of investors and the public 
interest. The Exchange also represents that it has the necessary system 
capacity to support the new complex FLEX Order type. Finally, the

[[Page 4686]]

Exchange does not believe that any market disruptions will be 
encountered with the introduction of this complex FLEX Order type. The 
Exchange currently allows for trading of several types of complex 
orders, including Stock-Option Orders, and has not experienced any 
market disruptions or issues with capacity. Rather, the Exchange 
believes the introduction of this complex FLEX Order type may promote 
more efficient trading, as investors wishing to trade a complex 
strategy containing both FLEX Option series and non-FLEX Option series 
would no longer be required to execute such strategy using two or more 
separate orders.
Other FLEX Changes
    The Exchange proposes to amend Options 3A, Section 11(b)(2)(D)(vi) 
related to FLEX Options Trading to add the following language to the 
rule, ``Complex FLEX responses must be entered in increments provided 
in Options 3, Section 14(c)(1) at the proposed execution net price or 
at a price that is at least one cent better for the Agency Order for a 
Stock-Option Strategy or a Stock-Complex Strategy.'' The minimum price 
increment for FLEX responses must adhere to the allowable price 
increments for FLEX. A response to a FLEX Auction of a Complex Order 
must have a net price. The System will reject a FLEX response that is 
not in the applicable minimum increment. The Exchange believes that 
this additional language will provide members with additional 
information as all Complex Orders trade in the increments described in 
Options 3, Section 14(c)(1) which states that bids and offers for 
Complex Options Strategies may be expressed in one cent ($0.01) 
increments, and the options leg of Complex Options Strategies may be 
executed in one cent ($0.01) increments, regardless of the minimum 
increments otherwise applicable to the individual options legs of the 
order. Bids and offers for Stock-Option Strategies or Stock-Complex 
Strategies may be expressed in any decimal price determined by the 
Exchange, and the stock leg of a Stock-Option Strategy or Stock-Complex 
Strategy may be executed in any decimal price permitted in the equity 
market. The options leg of a Stock-Option Strategy or Stock-Complex 
Strategy may be executed in one cent ($0.01) increments, regardless of 
the minimum increments otherwise applicable to the individual options 
legs of the order. A similar change is also proposed for Options 3A, 
Section 12(c)(5)(G) that provides, ``FLEX PIXL responses in a complex 
strategy with a stock component that are through the Stop Price must 
improve such Stop Price by at least one cent'' and at proposed Options 
3A, Section 13(c)(5)(G) that provides, ``FLEX PIXL responses in a 
complex strategy with a stock component that are through the Stop Price 
must improve such Stop Price by at least one cent.'' Additionally, the 
same change is proposed for FLEX SOM at Options 3, Section 
13(c)(5)(G).\64\
---------------------------------------------------------------------------

    \64\ As proposed, Options 3, Section 13(c)(5)(G) would state 
that FLEX SOM responses in a complex strategy with a stock component 
that are through the Stop Price must improve such Stop Price by at 
least one cent.
---------------------------------------------------------------------------

    The Exchange proposes to amend Options 3A, Section 14(b) related to 
Risk Protections to provide that certain complex order risk protections 
in Options 3, Section 16 are available to FLEX, such as Options 
Strategy Protections (only to FLEX Auctions and FLEX responses in 
Section 11(b) above), Size Limitation, the Price Limit for Complex 
Orders protections as applicable to the stock component (as described 
in Options 3, Section 16(a), (except that DNTT is not available for the 
stock component), the Stock-Tied NBBO protections (only to FLEX 
Auctions and FLEX responses in Section 11(b) above) (as described in 
Options 3, Section 16(d)), and the Stock-Tied Reg SHO protections (as 
described in Options 3, Section 16(e)). The Exchange proposes this rule 
text to make clear that ``Do-Not-Trade-Through'' or ``DNTT'' will not 
apply to the stock component of the order. This additional language 
provides greater clarity to the risk protections. The Exchange notes 
that DNTT applies only to options transactions. The stock component of 
the order is not executed on the Exchange and therefore would not be 
subject to DNTT.
Implementation
    The Exchange proposes to implement the rule changes on or before Q3 
2027. The Exchange will issue an Options Trader Alert notifying Members 
of each implementation date.
2. Statutory Basis
    The Exchange believes that its proposal is consistent with Section 
6(b) of the Act,\65\ in general, and furthers the objectives of Section 
6(b)(5) of the Act,\66\ in particular, in that it is designed to 
promote just and equitable principles of trade, to remove impediments 
to and perfect the mechanism of a free and open market and a national 
market system, and, in general to protect investors and the public 
interest.
---------------------------------------------------------------------------

    \65\ 15 U.S.C. 78f(b).
    \66\ 15 U.S.C. 78f(b)(5).
---------------------------------------------------------------------------

FLEX Percentages
    The Exchange believes that the proposed enhancement to allow prices 
in FLEX trading to be expressed using a percentage-based methodology 
would remove impediments to and perfect the mechanism of a free and 
open market as this change would provide greater flexibility in terms 
of describing an option contract tailored to the needs of the investor. 
In addition, the Exchange believes that the related changes to specify 
how exercise prices and bids/offers will be rounded, and how they will 
be stated using the proposed percentage-based methodology should 
provide greater clarity and allow market participants to specify 
contracts that meet their particular needs. In addition, the proposed 
changes would align the Exchange's FLEX rules with the FLEX rules of 
Cboe as noted throughout the ``Purpose--FLEX Percentages'' subsection 
above, and therefore raises no novel issues.
FLEX DAC
    The Exchange believes that the proposed DAC order will promote just 
and equitable principles of trade and will remove impediments to and 
perfect the mechanism of a free and open market and national market 
system, as it will allow market participants to incorporate into the 
pricing of their options the closing price of the underlying on the 
transaction date based on the amount in which the price or value of the 
underlying change intraday, thus, allowing investors to incorporate 
potential market moves that may occur following the execution of an 
order up to the market close. As described above, the market close is a 
time in which a significant numbers of participants interact on the 
equity markets. This activity may contribute to substantially increased 
liquidity and significant price volatility near the close of the equity 
markets, which can potentially cause the closing prices of the 
underlyings and, therefore, the settlement prices of options on those 
underlyings to greatly deviate from the average option execution prices 
traded earlier that trading day. The Exchange believes DAC orders will 
serve to protect investors by allowing them, through use of the 
underlying reference prices and delta, to fully hedge their options 
positions taken during the trading day through the market close and 
potentially benefit from price movements at the close. Also, as managed 
funds have begun utilizing strategies at the close in order to

[[Page 4687]]

mitigate risk at the close and participate in beneficial market moves 
at the same time, the Exchange believes that DAC orders will offer an 
additional method by which these funds will be able to meet these 
objectives through the execution of FLEX options strategies, thereby 
benefiting investors that hold shares of these funds.
    Additionally, the proposed restrictions in Options 3A, Section 
6(c)(2) in connection with the submission of simple DAC orders in 
equity options are designed to prevent fraudulent and manipulative acts 
and practices and protect investors by mitigating the potential risk 
associated with expiration day price swings, which may potentially 
expose DAC order users to the gamma effect of options as they become 
more sensitive to underlying price changes as such options approach 
expiration, and reducing the amount of time during which the underlying 
price could potentially move. As described above, single-name 
securities may experience greater price sensitivity and may experience 
larger price swings than compared to indexes and ETFs, and DAC option 
holders in particular may potentially be subject to a greater risk of 
paying much higher premiums given the price adjustment at close. The 
Exchange believes the proposed restrictions will minimize any potential 
incentive to attempt to manipulate the equities that may underlie a DAC 
order, particularly those securities that may experience relatively 
lower volume, and will mitigate potential risk to holders of DAC 
options in single-name securities.
    The Exchange further believes that the adoption of DAC orders on 
the Exchange will promote just and equitable principles of trade, 
remove impediments to and perfect the mechanism of a free and open 
market and a national market system because DAC orders will be entered, 
priced, prioritized, allocated and execute as any other FLEX Order 
would when submitted into any FLEX auction. Like any FLEX Order, a FLEX 
DAC order may only be submitted into FLEX Options series eligible for 
trading pursuant to the FLEX Rules. As such, market participants would 
not be subject to any new or novel order entry, pricing, allocation, 
and execution processes in relation to their DAC orders as such orders 
will be handled pursuant to the Exchange Rules in Options 3A governing 
the applicable FLEX auction processes, which have been previously 
approved by the Commission.
    The Exchange believes that the general delta value requirements are 
in line with just and equitable principles or trading and with the 
protection of investors because they are consistent with the manner in 
which a delta is commonly known to function and generally used in 
options trading. Further, the Exchange believes that proposed Options 
3A, Section 14(d) provides a System control in connection with DAC 
orders that is designed to protect investors. The Exchange believes the 
proposed reference price reasonability check will mitigate risks 
associated submitting a DAC order with a reference price unintended by 
the Member as a likely result of human or operational error. The 
Exchange also notes that the proposed DAC order reasonability check in 
Options 3A, Section 14(d) is materially identical to Cboe's DAC order 
reasonability check in Cboe Rule 5.34(c)(11).
    In addition, the Exchange believes that permitting a DAC order to 
execute only in a FLEX auction will protect investors and serve to 
remove impediments to and perfect the mechanism of a free and open 
market and national market system, because it is consistent with the 
intended purpose of DAC orders. This would ensure that DAC orders that 
can execute would do so within a short time following submission and 
therefore in a manner that achieves a Member's desired delta-adjusted 
price. As described above, the goal of a DAC order is to adjust the 
execution price based on a delta value applied to the change in the 
underlying price between the market close and the time of the trade. 
Therefore, a DAC order must be able to execute as close in time as 
possible to the time of order submission (i.e., the point in time a 
Member designates a reference price and delta) so as to allow the 
reference price and related delta to remain in line with the underlying 
price information at the time of submission and achieve the User's 
desired result. As such, a DAC order submitted to a FLEX auction, like 
any FLEX Order submitted in a FLEX auction, will be executed within a 
short time following submission. Thus, the Exchange believes that the 
proposed limitation to FLEX auctions would protect investors by 
allowing DAC orders to execute in line with Members' expectations and a 
DAC order's intended purpose.
    The Exchange believes that by providing that a User may not apply 
the DAC order instruction to a FLEX Order for a FLEX Option series with 
an exercise price formatted as a percentage of the closing value of the 
underlying on the trade date will remove impediments to and perfect the 
mechanism of a free and open market and national market system and 
generally protect investors because these FLEX terms are inconsistent 
with the DAC order instruction and would conflict with the manner in 
which the System calculates the delta-adjusted price upon the market 
close.
    The Exchange notes that it has discussed with the OCC and OPRA its 
plan to adopt DAC orders and to apply the restatement process described 
above to FLEX DAC orders. Moreover, the Exchange represents that it has 
the necessary systems capacity to handle any additional order traffic 
and the related restatements that may result from the adoption of DAC 
orders, thereby ensuring the protection of investors. The Exchange also 
has consulted with OPRA and understands that they have the necessary 
system capacity as well. The Exchange also believes that its existing 
surveillances are adequate to monitor trading of DAC orders thereby 
helping to ensure the maintenance of a fair and orderly market.
    Finally, as noted in the purpose section, the proposed DAC changes 
are substantially similar to Cboe's DAC order instruction. As discussed 
above, there are minor differences in the Exchange's proposed 
implementation of DAC orders. Notably, the Exchange will not adopt 
Cboe's DAC rule provisions related to open outcry trading, designations 
for different trading sessions, or Asian- and Cliquet-settled FLEX 
Options, as the Exchange does not offer these capabilities today. The 
Exchange therefore does not believe that the proposed changes raise any 
novel issues that have not already been considered by the Commission, 
notwithstanding these minor differences.
FLEX v. Non-FLEX
    Specifically, the Exchange believes the proposed rule change will 
benefit investors by expanding investors' choices and flexibility with 
respect to the trading of FLEX Options. The Exchange believes that 
introducing FLEX v. Non-FLEX Orders will increase order flow to the 
Exchange, increase the variety of options products available for 
trading, and provide a valuable tool for investors to manage risk.
    The Exchange believes that the proposed rule change would remove 
impediments to and perfect the mechanism of a free and open market as 
FLEX v. Non-FLEX Orders would enable market participants to execute a 
complex strategy including a combination of FLEX Option series and non-
FLEX Option series, which would, in turn, provide greater opportunities 
for market participants to manage risk through the use of a complex 
FLEX

[[Page 4688]]

Order to the benefit of investors and the public interest. The proposed 
rule change will benefit Members by providing a more efficient 
mechanism for Members to provide and seek liquidity for customized or 
complex FLEX strategies which include a non-FLEX Option leg(s).
    Further, trading FLEX Options, including FLEX v. Non-FLEX Orders, 
on an exchange is an alternative to trading customized options in OTC 
markets and carries with it the advantages of exchange markets such as 
transparency, parameters and procedures for clearance and settlement, 
and a centralized counterparty clearing agency. Therefore, the Exchange 
believes the proposed rule change will promote these same benefits for 
the market as a whole by providing an additional venue for market 
participants to seek liquidity for customized, large-sized, or Complex 
FLEX option orders, including those with a non-FLEX Option leg(s). The 
Exchange believes that providing an additional venue for these FLEX 
orders, rather than potentially splitting the orders across OTC and 
exchange markets, will benefit investors by increasing competition for 
order flow and executions, and thereby potentially result in more 
competitive pricing related to FLEX Options.
    The Exchange believes that the proposed changes to Options 3A, 
Section 7 to add FLEX v. Non-FLEX Orders to the list of complex orders 
available for FLEX trading, are consistent with the Act and remove 
impediments to and perfect the mechanism of a free and open market and 
a national market system because the changes will allow investors to 
trade in a more efficient manner, allowing investors to better 
customize their trading strategies and implement more precise trading 
strategies which are not available under current rules. Currently, a 
market participant is unable to trade a FLEX Option and a listed option 
as part of the same complex strategy; such user must submit an order 
containing the FLEX Option(s) and an order containing the listed 
option. This may introduce additional complexities such as price and 
legging risk, which would be eliminated under the proposed rule change. 
These complexities may unnecessarily limit market participants' ability 
to trade in an exchange environment that offers the added benefits of 
transparency, price discovery, liquidity, and financial stability. 
These investors may have improved capability under the proposed rule 
change to execute strategies to meet their specific investment 
objectives by using a single order with customized FLEX Option legs 
with FLEX and Non-FLEX Orders.
    The Exchange's proposal to amend Options 3A, Section 
12(e)(1)(B)(ii) related to FLEX PIXL to add rule text concerning 
guaranteed allocation is consistent with the Act as this is case today 
and this rule text will serve as a guidepost and reminder that a Member 
may elect less than their guaranteed allocation in non-FLEX Option 
legs.
    Similarly, the Exchange also believes the proposed changes to 
Options 3A, Section 7(a), to remove the requirement that each leg of a 
complex FLEX Order must have the same exercise style, will remove 
impediments to and perfect the mechanism of a free and open market and 
benefit investors, because it will provide Members with additional 
flexibility and precision in their investment strategies, by allowing 
Members to trade complex strategies that would otherwise be required to 
split into multiple, separate orders.
    The Exchange believes the proposed addition of Options 3A, Section 
9(b) which address when the Exchange may halt trading in a FLEX Options 
complex strategy (whether comprised of all FLEX Option legs or FLEX and 
non-FLEX Option legs), are consistent with the Act and promotes the 
public interest and the protection of investors by clarifying the 
Exchange's authority with respect to FLEX Options complex strategies 
comprised of all FLEX Option legs and providing a consistent and 
transparent procedure with respect to FLEX Options complex strategies 
comprised of FLEX and non-FLEX Option legs, that would be applied by 
the Exchange, similar to trading halt authority under current 
rules.\67\ Further, the proposed change to add the defined term ``FLEX 
Option series'' provides further clarity within the Rules and 
eliminates potential confusion by providing a definition of ``FLEX 
Option series'' to the benefit of investors.
---------------------------------------------------------------------------

    \67\ See, e.g., Options 3A, Section 9.
---------------------------------------------------------------------------

    The Exchange believes the proposed changes to Options 3A, Section 
11(a)(2), which provide clarity with respect to the criteria required 
for Complex FLEX Orders with FLEX Option legs only in new (B), helps 
will help promote a fair and orderly national options market system. As 
such, the changes proposed under Options 3A, Section 11(a)(2)(C), to 
separate out the requirements for Complex FLEX Orders with FLEX Option 
legs only, provide clarity regarding the requirements for Complex FLEX 
Orders with FLEX Option legs only, as compared to the proposed 
requirements for Complex FLEX Orders with FLEX and non-FLEX Option 
legs.
    The Exchange believes the proposed pricing requirements for FLEX v. 
Non-FLEX Orders, set forth in proposed Options 3A, Section 11(a)(2)(C), 
would remove impediments to and perfect the mechanism of a free and 
open market, as the proposed trading process for FLEX v. Non-FLEX 
Orders will provide the ability for investors to achieve the desired 
net package price for those orders while protecting customers with 
resting interest in the non-FLEX simple order book. By requiring a FLEX 
v. Non-FLEX Order submitted into a FLEX Auction to include a bid or 
offer price for each FLEX Option leg, but no bid or offer for each non-
FLEX Option leg, and a net price, the requirements ensure that the non-
FLEX Option leg will be subject to the same pricing requirements as 
they would if not part of a FLEX v. Non-FLEX Order. Specifically, the 
price of any non-FLEX Option leg that is part of a FLEX v. Non-FLEX 
Order may not be outside of the BBO or NBBO. The Exchange's proposal 
will continue to protect Priority Customer interest on the Exchange, as 
the non-FLEX Option legs of a FLEX v. Non-FLEX Order will always trade 
at a price better than BBO if there is a Customer on a leg. Further, 
the price of a FLEX Option leg(s) that is part of a FLEX v. Non-FLEX 
Order must, following execution of the Non-FLEX Option leg(s), serve to 
achieve the net execution price (which may not be worse than the 
desired net price included at order submission), which the Exchange 
believes will protect investors by ensuring the price of the FLEX 
Option leg(s) adhere to the agreed upon execution prices and the 
order's limit price.
    The Exchange believes this proposed trading process will ensure 
that a user who chooses to submit a listed (i.e., Non-FLEX) leg as part 
of a FLEX v. Non-FLEX Order is subject to the same pricing requirements 
as they would be if the listed leg was not submitted with FLEX Option 
legs for execution. Ultimately, FLEX v. Non-FLEX Orders will trade in 
the same manner as Complex FLEX Orders do today, and execution of the 
non-FLEX Option legs of these orders will continue to comply with 
linkage requirements (by not permitting trade-throughs of the NBBO) and 
protect resting customer interest in the simple order book. Further, 
the Exchange believes that the proposal to not permit the non-FLEX 
Option legs of a FLEX v. Non-FLEX Order to leg into the simple order 
book is consistent with the Act and promotes the public interest and 
the protection of investors, because it will provide for more efficient 
execution and processing of FLEX v.

[[Page 4689]]

Non-FLEX Orders, as legging would prevent execution opportunities for 
these orders (as discussed above).
    Finally, the Exchange believes that the proposed rule change is 
designed to not permit unfair discrimination among market participants 
as all Members may, but are not required to, trade FLEX v. Non-FLEX 
Orders.
Other FLEX Changes
    The Exchange's proposal to amend Options 3A, Section 
11(b)(2)(D)(vi) and Options 3A, Section 12(c)(5)(G) to describe the 
minimum increments is consistent with the Act because all Complex 
Orders trade in the increments described in Options 3, Section 14(c)(1) 
which states that bids and offers for Complex Options Strategies may be 
expressed in one cent ($0.01) increments, and the options leg of 
Complex Options Strategies may be executed in one cent ($0.01) 
increments, regardless of the minimum increments otherwise applicable 
to the individual options legs of the order. Bids and offers for Stock-
Option Strategies or Stock-Complex Strategies may be expressed in any 
decimal price determined by the Exchange, and the stock leg of a Stock-
Option Strategy or Stock-Complex Strategy may be executed in any 
decimal price permitted in the equity market. The options leg of a 
Stock-Option Strategy or Stock-Complex Strategy may be executed in one 
cent ($0.01) increments, regardless of the minimum increments otherwise 
applicable to the individual options legs of the order.
    The Exchange's proposal to amend Options 3A, Section 14(b) to 
provide that certain complex order risk protections in Options 3, 
Section 16 are not available for the stock component is consistent with 
the Act as the risk protections are for the options.

B. Self-Regulatory Organization's Statement on Burden on Competition

    The Exchange does not believe that the proposed rule change will 
impose any burden on competition not necessary or appropriate in 
furtherance of the purposes of the Act. The proposed enhancements with 
respect to FLEX percentages and FLEX DAC will not impose an undue 
burden on intra-market competition because the use of both the 
percentage methodology and the DAC order instruction will be optional 
and available to all Members on the same terms. For example, any Member 
may determine whether to apply a DAC order instruction to its FLEX 
Order, and the System will handle FLEX DAC orders submitted by Members 
in the same manner pursuant to the proposed rule change.
    The proposed percentage methodology will not impose an undue burden 
on inter-market competition as it is intended to provide greater 
flexibility in terms of describing an option contract tailored to the 
needs of the investor. Further, the proposed DAC order instruction will 
not impose an undue burden on inter-market competition because it is 
intended to provide market participants with an additional means to 
manage risks in connection with potential volatility and downside price 
swings that may occur near the market close, while allowing them to 
receive potential benefits associated with any market moves near the 
market close. As noted above, the proposed enhancements to FLEX are 
substantially similar to Cboe's FLEX rules. As such, the Exchange 
believes that its proposal may foster competition among options 
exchanges, as it would provide additional choices for investors and 
market participants who seek to utilize the proposed percentage 
methodology or the proposed DAC functionality. Moreover, the Commission 
has repeatedly expressed its preference for competition over regulatory 
intervention in determining prices, products, and services in the 
securities markets. Specifically, in Regulation NMS, the Commission 
highlighted the importance of market forces in determining prices and 
SRO revenues and, also recognized that current regulation of the market 
system ``has been remarkably successful in promoting market competition 
in its broader forms that are most important to investors and listed 
companies.'' \68\
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    \68\ See Securities Exchange Act Release No. 51808 (June 9, 
2005), 70 FR 37496, 37499 (June 29, 2005).
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    The Exchange does not believe that the proposed rule changes for 
FLEX v. Non-FLEX will impose any burden on intramarket competition that 
is not necessary or appropriate in furtherance of the purposes of the 
Act, as all Members that are registered as FLEX Traders in accordance 
with the Exchange's Rules will be able to trade FLEX v. Non-FLEX Orders 
in the same manner.
    The Exchange does not believe that the proposed rule change will 
impose any burden on intermarket competition that is not necessary or 
appropriate in furtherance of the purposes of the Act, as the proposal 
is designed to increase competition for order flow on the Exchange in a 
manner that is beneficial to investors because it is designed to 
provide investors seeking to execute both a FLEX Option(s) and a listed 
option(s) with a more effective method of executing the trades, which 
may result in trade efficiencies (i.e., pricing or reporting (e.g., 
position limits) efficiencies) \69\ and reduced risk (i.e., pricing and 
legging risk). The Exchange believes the proposed rule change will 
encourage competition, as it may broaden the base of investors that use 
FLEX Options to manage their trading and investment risk, including 
investors that currently trade in the OTC market for customized 
options. The Exchange believes the proposed rule change may increase 
competition as it may lead to the migration of options currently 
trading in the OTC market to trading on the Exchange. Also, any 
migration to the Exchange from the OTC market would result in increased 
market transparency and thus increased price competition.
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    \69\ See, e.g., Options 3A, Section 18.
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    The Exchange further notes that it operates in a highly competitive 
market in which market participants can readily direct order flow to 
competing venues who offer similar functionality. All Members may, but 
are not required to, trade FLEX v. Non-FLEX Orders at the Exchange. The 
Exchange does not believe the proposed rule change will impose any 
burden on intermarket competition that is not necessary or appropriate 
in furtherance of the purposes of the Act, as other exchanges could 
adopt this order type if so desired.
Other FLEX Changes
    The Exchange's proposal to amend Options 3A, Section 
11(b)(2)(D)(vi) and Options 3A, Section 12(c)(5)(G) to describe the 
minimum increments does not impose an undue burden on competition 
because all Complex Orders trade in the increments described in Options 
3, Section 14(c)(1) on Phlx uniformly.
    The Exchange's proposal to amend Options 3A, Section 14(b) to 
provide that certain complex order risk protections in Options 3, 
Section 16 are not available for the stock component is does not impose 
an undue burden on competition as the risk protections are for the 
options.

C. Self-Regulatory Organization's Statement on Comments on the Proposed 
Rule Change Received From Members, Participants, or Others

    No written comments were either solicited or received.

III. Date of Effectiveness of the Proposed Rule Change and Timing for 
Commission Action

    Because the foregoing proposed rule change does not: (i) 
significantly affect

[[Page 4690]]

the protection of investors or the public interest; (ii) impose any 
significant burden on competition; and (iii) become operative for 30 
days from the date on which it was filed, or such shorter time as the 
Commission may designate, it has become effective pursuant to Section 
19(b)(3)(A)(iii) of the Act \70\ and subparagraph (f)(6) of Rule 19b-4 
thereunder.\71\
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    \70\ 15 U.S.C. 78s(b)(3)(A)(iii).
    \71\ 17 CFR 240.19b-4(f)(6). In addition, Rule 19b-4(f)(6) 
requires a self-regulatory organization to give the Commission 
written notice of its intent to file the proposed rule change at 
least five business days prior to the date of filing of the proposed 
rule change, or such shorter time as designated by the Commission. 
The Exchange has satisfied this requirement.
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    At any time within 60 days of the filing of the proposed rule 
change, the Commission summarily may temporarily suspend such rule 
change if it appears to the Commission that such action is necessary or 
appropriate in the public interest, for the protection of investors, or 
otherwise in furtherance of the purposes of the Act. If the Commission 
takes such action, the Commission shall institute proceedings to 
determine whether the proposed rule should be approved or disapproved.

IV. Solicitation of Comments

    Interested persons are invited to submit written data, views and 
arguments concerning the foregoing, including whether the proposed rule 
change is consistent with the Act. Comments may be submitted by any of 
the following methods:

Electronic Comments

    <bullet> Use the Commission's internet comment form (<a href="https://www.sec.gov/rules/sro.shtml">https://www.sec.gov/rules/sro.shtml</a>); or
    <bullet> Send an email to <a href="/cdn-cgi/l/email-protection#c2b0b7aea7efa1adafafa7acb6b182b1a7a1eca5adb4"><span class="__cf_email__" data-cfemail="84f6f1e8e1a9e7ebe9e9e1eaf0f7c4f7e1e7aae3ebf2">[email&#160;protected]</span></a>. Please include 
file number SR-Phlx-2026-05 on the subject line.

Paper Comments

    <bullet> Send paper comments in triplicate to Secretary, Securities 
and Exchange Commission, 100 F Street NE, Washington, DC 20549-1090.

All submissions should refer to file number SR-Phlx-2026-05. This file 
number should be included on the subject line if email is used. To help 
the Commission process and review your comments more efficiently, 
please use only one method. The Commission will post all comments on 
the Commission's internet website (<a href="https://www.sec.gov/rules/sro.shtml">https://www.sec.gov/rules/sro.shtml</a>). Copies of the filing will be available for inspection and 
copying at the principal office of the Exchange. Do not include 
personal identifiable information in submissions; you should submit 
only information that you wish to make available publicly. We may 
redact in part or withhold entirely from publication submitted material 
that is obscene or subject to copyright protection. All submissions 
should refer to file number SR-Phlx-2026-05 and should be submitted on 
or before February 23, 2026.

    For the Commission, by the Division of Trading and Markets, 
pursuant to delegated authority.\72\
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    \72\ 17 CFR 200.30-3(a)(12) and (59).
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Sherry R. Haywood,
Assistant Secretary.
[FR Doc. 2026-02004 Filed 1-30-26; 8:45 am]
BILLING CODE 8011-01-P


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Indexed from Federal Register on February 2, 2026.

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