[Federal Register Volume 90, Number 128 (Tuesday, July 8, 2025)]
[Notices]
[Pages 30177-30183]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2025-12636]


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SECURITIES AND EXCHANGE COMMISSION

[Release No. 34-103376; File No. SR-MIAX-2025-27]


Self-Regulatory Organizations: Notice of Filing of a Proposed 
Rule Change by Miami International Securities Exchange, LLC To Amend 
Certain of the Exchange's Index Options Rules To Allow the Exchange To 
List and Trade Options on Micro Narrow-Based Indexes

July 2, 2025.
    Pursuant to the provisions of 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 June 25, 2025, Miami International Securities 
Exchange, LLC (``MIAX'' or ``Exchange'') filed with the Securities and 
Exchange Commission (``Commission'') a proposed rule change as 
described in Items I and II 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 amend certain of the Exchange's Index 
Options Rules (Chapter XVIII) to: (1) adopt a new classification of 
narrow-based indexes, classified as ``micro narrow-based'' indexes; (2) 
establish the initial listing standards and maintenance standards for 
micro narrow-based indexes; and (3) adopt rules regarding position 
limits and exercise limits for micro narrow-based index options.
    The text of the proposed rule change is available on the Exchange's 
website at https://www.miaxglobal.com/markets/us-options/all-options-exchanges/rule-filings, at MIAX's principal office, and at the 
Commission's Public Reference Room.

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 adopt rules to allow the Exchange to list 
and trade options on micro narrow-based indexes. The proposed rules 
include the definition of a micro narrow-based index, listing and 
maintenance criteria for a micro narrow-based index, and position 
limits and exercise limits for micro narrow-based index options. All of 
the proposed rules and changes to

[[Page 30178]]

existing Exchange Rules are based on the existing rules of other 
options exchanges. The proposed rule change is intended to expand the 
Exchange's capacity to introduce and trade new and innovative index 
option products on the Exchange System.\3\
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    \3\ The term ``System'' means the automated trading system used 
by the Exchange for the trading of securities. See Exchange Rule 
100.
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Proposed Definition of Micro Narrow-Based Index
    The Exchange proposes to amend Exchange Rule 1801(m) to add the 
definition of micro narrow-based index. The proposed definition of 
``micro narrow-based index'' is an industry or narrow-based index that 
meets the specific criteria provided under proposed Exchange Rule 
1802(f). The Exchange notes that other exchanges have the same 
definition of micro narrow-based index.\4\ In addition, the Exchange 
proposes to make conforming changes to the hierarchical headings in 
Exchange Rule 1801. Specifically, subparagraphs (m)-(t) will be 
renumbered as (n)-(u). The purpose of the proposed changes is to 
provide consistency and clarity in the Rulebook regarding the 
definitions that are applicable to index options.
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    \4\ See e.g., Cboe Exchange, Inc. (``Cboe'') Rule 4.11, 
available at https://cdn.cboe.com/resources/regulation/rule_book/C1_Exchange_Rule_Book.pdf (last visited June 9, 2025).
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Proposed Micro Narrow-Based Index Initial Listing Criteria
    Proposed Exchange Rule 1802(f) will describe the initial listing 
standards for a micro narrow-based index on which options may be traded 
on the Exchange. Pursuant to proposed Exchange Rule 1802(f), the 
Exchange may trade options on a micro narrow-based index pursuant to 
19b-4(e) of the Act,\5\ if each of the following conditions is 
satisfied:
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    \5\ 17 CFR 242.19b-4(e).
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    (1) The index is a security index:
    (i) that has nine or fewer component securities;
    (ii) in which a component security comprises more than 30% of the 
index's weighting;
    (iii) in which the five highest weighted component securities in 
the aggregate comprise more than 60% of the index's weighting; or
    (iv) in which the lowest weighted component securities comprising, 
in the aggregate, 25% of the index's weighting have an aggregate dollar 
value of average daily trading volume of less than $50,000,000 (or in 
the case of an index with 15 or more component securities, $30,000,000) 
except that if there are two or more securities with equal weighting 
that could be included in the calculation of the lowest weighted 
component securities comprising, in the aggregate, 25% of the index's 
weighting, such securities shall be ranked from lowest to highest 
dollar value of average daily trading volume and shall be included in 
the calculation based on their ranking starting with the lowest ranked 
security;
    (2) The index is capitalization-weighted, modified capitalization-
weighted, price-weighted, share weighted, equal dollar-weighted, 
approximate equal-dollar weighted, or modified equal-dollar weighted;
    (i) For the purposes of this Exchange Rule 1802(f), an approximate 
equal-dollar weighted index is composed of one or more securities in 
which each component security will be weighted equally based on its 
market price on the index's selection date and the index must be 
reconstituted and rebalanced if the notional value of the largest 
component is at least twice the notional volume of the smallest 
component for 50% or more of the trading days in the three months prior 
to December 31 of each year. For purposes of this provision the 
``notional value'' is the market price of the component times the 
number of shares of the underlying component in the index. 
Reconstitution and rebalancing are also mandatory if the number of 
components in the index is greater than five at the time of 
rebalancing. The Exchange reserves the right to rebalance quarterly at 
its discretion.
    (ii) For the purposes of this Exchange Rule 1802(f), a modified 
equal-dollar weighted index is an index in which each underlying 
component represents a pre-determined weighting percentage of the 
entire index. Each component is assigned a weight that takes into 
account the relative market capitalization of the securities comprising 
the index. A modified equal-dollar weighted index will be balanced 
quarterly.
    (iii) For the purposes of this Exchange Rule 1802(f), a share-
weighted index is calculated by multiplying the price of the component 
security by an adjustment factor. Adjustment factors are chosen to 
reflect the investment objective deemed appropriate by the designer of 
the index and will be published by the Exchange as part of the contract 
specifications. The value of the index is calculated by adding the 
weight of each component security and dividing the total by an index 
divisor, calculated to yield a benchmark index level as of a particular 
date. A share-weighted index is not adjusted to reflect changes in the 
number of outstanding shares of its components. A share-weighted micro 
narrow-based index will not be re- balanced. If a share-weighted micro 
narrow-based index fails to meet the maintenance listing standards 
under Exchange Rule 1802(g), the Exchange will restrict trading in 
existing option series to closing transactions and will not issue 
additional series for that index.
    (iv) The Exchange may rebalance any micro narrow-based index on an 
interim basis if warranted as a result of extraordinary changes in the 
relative values of the component securities. To the extent investors 
with open positions must rely upon the continuity of the options 
contract on the index, outstanding contracts are unaffected by 
rebalancings.
    (3) Each component security in the index has a minimum market 
capitalization of at least $75 million, except that each of the lowest 
weighted securities in the index that in the aggregate account for no 
more than 10% of the weight of the index may have a minimum market 
capitalization of only $50 million;
    (4) The average daily trading volume in each of the preceding six 
months for each component security in the index is at least 45,500 
shares, except that each of the lowest weighted component securities in 
the index that in the aggregate account for no more than 10% of the 
weight of the index may have an average daily trading volume of only 
22,750 shares for each of the last six months;
    (5) In a capitalization-weighted index, the lesser of: (i) the five 
highest weighted component securities in the index each have had an 
average daily trading volume of at least 90,000 shares over the past 
six months; or (ii) the highest weighted component securities in the 
index that in the aggregate represent at least 30% of the total number 
of component securities in the index each have had an average daily 
trading volume of at least 90,000 shares over the past six months;
    (6) Subject to subparagraphs (4) and (5) above, the component 
securities that account for at least 90% of the total index weight and 
at least 80% of the total number of component securities in the index 
must meet the requirements of Exchange Rule 402 applicable to 
individual underlying securities;
    (7)
    (i) Each component security in the index is an ``NMS Security'' as 
defined in Rule 600 of Regulation NMS under the Exchange Act; and
    (ii) Foreign securities or ADRs that are not subject to 
comprehensive surveillance sharing agreements do not

[[Page 30179]]

represent more than 20% of the weight of the index;
    (8) The current underlying index value will be reported at least 
once every 15 seconds during the time the index options are traded on 
the Exchange;
    (9) An equal dollar-weighted index will be rebalanced at least once 
every quarter;
    (10) If the underlying index is maintained by a broker-dealer, the 
index is calculated by a third party who is not a broker-dealer, and 
the broker-dealer has in place an information barrier around its 
personnel who have access to information concerning changes in and 
adjustments to the index;
    (11) Each component security in the index is registered pursuant to 
Section 12 of the Exchange Act; and
    (12) Cash settled index options are designated as A.M.-settled 
options.
    The above initial listing standards are substantively similar as 
the initial listing standards currently in place on other exchanges.\6\
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    \6\ See e.g., Cboe Rule 4.10(c), available at https://cdn.cboe.com/resources/regulation/rule_book/C1_Exchange_Rule_Book.pdf (last visited June 9, 2025); see also MEMX 
Rule 29.6(d), available at https://info.memxtrading.com/wp-content/uploads/2025/05/MEMX-Rulebook-5.14.25-clean.pdf. (last visited June 
9, 2025).
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    The Exchange also proposes to make conforming changes to Exchange 
Rule 1802(a) to add a cross reference to proposed new subparagraph (f) 
to the exceptions to the rule filing requirement applicable to the 
listing of a class of index option provided under Section 19(b) of the 
Act. Currently, Exchange Rule 1802(a) provides that except as set forth 
in subparagraph (b) and (d), which refer to initial listing standards 
for narrow-based indexes and broad-based indexes, the listing of a 
class of index options requires a proposed rule change to be approved 
by the Securities and Exchange Commission (the ``Commission'') under 
Section 19(b) of the Exchange Act. Since the Exchange proposes to adopt 
rules to allow the Exchange to list and trade options on micro narrow-
based indexes, in addition to narrow-based indexes and broad-based 
indexes, the Exchange proposes to amend Exchange Rule 1802(a) to add a 
cross reference to proposed new subparagraph (f) (Micro Narrow-Based 
Index Initial Listing Criteria) to the exceptions to the rule filing 
requirement applicable to the listing of a class of index options 
pursuant to Section 19(b) of the Act. This is to allow the Exchange to 
trade options on micro narrow-based indexes pursuant to Rule 19b-4(e) 
of the Act, without filing of a proposed rule change to be approved by 
the Commission, if each of the initial listing standards is satisfied.
Proposed Micro Narrow-Based Index Maintenance Listing Criteria
    In addition to the initial listing standards, certain maintenance 
listing standards, listed below, will apply to each class of index 
options originally listed pursuant to proposed Exchange Rule 1802(f). 
Specifically, in order for an index to remain listed on the Exchange, 
pursuant to proposed Exchange Rule 1802(g), the following maintenance 
listing standards shall be satisfied:
    (1) The index meets the criteria of subparagraph (f)(1) of this 
Rule;
    (2) Subject to subparagraphs (g)(9) and (10) below, the component 
securities that account for at least 90% of the total index weight and 
at least 80% of the total number of component securities in the index 
must meet the requirements of Exchange Rule 402;
    (3) Each component security in the index has a market 
capitalization of at least $75 million, except that each of the lowest 
weighted component securities that in the aggregate account for no more 
than 10% of the weight of the index may have a market capitalization of 
only $50 million;
    (4) Each component security in the index is an ``NMS Security'' as 
defined in Rule 600 of Regulation NMS under the Exchange Act;
    (5) Foreign securities or ADRs thereon that are not subject to 
comprehensive surveillance sharing agreements do not represent more 
than 20% of the weight of the index;
    (6) The current underlying index value will be reported at least 
once every 15 seconds during the time the index options are traded on 
the Exchange;
    (7) If the underlying index is maintained by a broker-dealer, the 
index is calculated by a third party who is not a broker-dealer, and 
the broker-dealer has in place an information barrier around its 
personnel who have access to information concerning changes in and 
adjustments to the index;
    (8) The total number of component securities in the index may not 
increase or decrease by more than 33\1/3\% from the number of component 
securities in the index at the time of its initial listing;
    (9) Trading volume of each component security in the index must be 
at least 500,000 shares for each of the last six months, except that 
for each of the lowest weighted component securities in the index that 
in the aggregate account for no more than 10% of the weight of the 
index, trading volume must be at least 400,000 shares for each of the 
last six months;
    (10) In a capitalization-weighted index and a modified 
capitalization weighted index, the lesser of the five highest weighted 
component securities in the index or the highest weighted component 
securities in the index that in the aggregate represent at least 30% of 
the total number of stocks in the index each have had an average 
monthly trading volume of at least 1,000,000 shares over the past six 
months;
    (11) Each component security in the index is registered pursuant to 
Section 12 of the Exchange Act;
    (12) In an approximate equal-dollar weighted index, the index must 
be reconstituted and rebalanced if the notional value of the largest 
component is at least twice the notional volume of the smallest 
component for 50% or more of the trading days in the three months prior 
to December 31 of each year. For purposes of this provision the 
``notional value'' is the market price of the component times the 
number of shares of the underlying component in the index. 
Reconstitution and rebalancing are also mandatory if the number of 
components in the index is greater than five at the time of 
rebalancing. The Exchange reserves the right to rebalance quarterly at 
its discretion;
    (13) In a modified equal-dollar weighted index the Exchange will 
re-balance the index quarterly;
    (14) In a share-weighted index, if a share-weighted micro narrow-
based index fails to meet the maintenance listing standards under 
Exchange Rule 1802(g), the Exchange will not re-balance the index, will 
restrict trading in existing option series to closing transactions, and 
will not issue additional series for that index; and
    (15) In the event a class of index options listed on the Exchange 
fails to satisfy the maintenance listing standards set forth herein, 
the Exchange shall not open for trading any additional series of 
options of that class unless such failure is determined by the Exchange 
not to be significant and the Commission concurs in that determination, 
or unless the continued listing of that class of index options has been 
approved by the Commission under Section 19(b)(2) of the Exchange Act.
    The proposed maintenance listing standards are substantively 
similar to

[[Page 30180]]

the maintenance standards currently in place on other exchanges.\7\
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    \7\ See e.g., Cboe Rule 4.10(d), available at https://cdn.cboe.com/resources/regulation/rule_book/C1_Exchange_Rule_Book.pdf (last visited June 9, 2025); see also MEMX 
Rule 29.6(e), available at https://info.memxtrading.com/wp-content/uploads/2025/02/MEMX-Rulebook-2.5.25.pdf (last visited June 9, 
2025).
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    The Exchange believes that the requirements in the proposed listing 
standards regarding, among other things, the minimum market 
capitalization, trading volume, and relative weightings of an 
underlying index's component stocks are designed to ensure that the 
markets for the index's component stocks are adequately capitalized and 
sufficiently liquid, and that no one stock dominates the index. The 
Exchange believes that these requirements minimize the potential for 
manipulating the underlying index.
    The Exchange further believes that the requirement in proposed 
Exchange Rule 1802(f)(8) that the current underlying index value will 
be reported at least once every 15 seconds during the time the index 
options are traded on the Exchange, and the requirement in proposed 
Exchange Rule 1802(g)(6) that the current underlying index value will 
be reported at least once every 15 seconds during the time the index 
options are traded on the Exchange should provide transparency with 
respect to current index values and contribute to the transparency of 
the market for micro narrow-based index options. In addition, the 
Exchange believes that the requirement in proposed Exchange Rule 
1802(f)(12) that cash settled index options are designated as A.M.-
settled, rather than on closing prices, should help to reduce the 
potential impact of expiring index options on the market for the 
index's component securities.
Proposed Position Limits for Micro Narrow-Based Index Options
    The Exchange proposes to adopt Exchange Rule 1805B relating to 
position limits for micro narrow-based index options by incorporating 
by referencing the applicable rules of Cboe. Specifically, proposed 
Exchange Rule 1805B(a) states that Members \8\ shall comply with the 
applicable rules of the Cboe with respect to position limits for micro-
narrow based index options traded on the Exchange and also on Cboe, or 
with the applicable rules of the Exchange for industry index options 
traded on the Exchange but not traded on Cboe.\9\ Proposed Exchange 
Rule 1805B(b) states that index options contracts shall not be 
aggregated with options contracts on any stocks whose prices are the 
basis for calculation of the index. Proposed Exchange Rule 1805B(c) 
states that positions in reduced-value index options shall be 
aggregated with positions in full-value index options. For such 
purposes, ten (10) reduced-value options shall equal one (1) full-value 
contract. The Exchange notes that other options exchanges have 
substantively similar rules relating to position limits for micro 
narrow-based index options.\10\
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    \8\ The term ``Member'' means an individual or organization 
approved to exercise the trading rights associated with a Trading 
Permit. Members are deemed ``members'' under the Exchange Act. See 
Exchange Rule 100.
    \9\ See Exchange Rule 1805.
    \10\ See MEMX Rule 29.7, available at https://info.memxtrading.com/wp-content/uploads/2025/05/MEMX-Rulebook-5.14.25-clean.pdf (last visited June 9, 2025); see also the Nasdaq 
Stock Market LLC (``Nasdaq'') rules, Options 4A, Section 7, 
available at https://listingcenter.nasdaq.com/rulebook/nasdaq/rules/Nasdaq%20Options%204A (last visited June 9, 2025).
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    The Exchange proposes to incorporate by reference as MIAX rules 
certain rules of the Cboe. Specifically, MIAX Rule 1805B proposes to 
incorporate by reference the applicable rules of Cboe with respect to 
position limits for micro narrow-based index options traded on the 
Exchange and also on Cboe. Thus, if approved, for certain MIAX rules, 
Members will comply with the MIAX rules by complying with the Cboe 
rules referenced. Using its authority under Section 36 of the Act, the 
Commission has previously exempted certain self-regulatory 
organizations (``SROs'') from the requirement to file proposed rule 
changes under Section 19(b) of the Act when incorporating another SRO's 
rules by reference.\11\ Each such exempt SRO has agreed to be governed 
by the incorporated rules, as amended from time to time, but, has not 
been required to file a separate proposed rule change with the 
Commission each time the SRO whose rules are incorporated by reference 
seeks to modify its rules. In addition, each SRO incorporated by 
reference only regulatory rules (e.g., margin, suitability, 
arbitration), not trading rules, and incorporated by reference whole 
categories of rules (i.e., did not ``cherry-pick'' certain individual 
rules within a category). Last, each exempt SRO had reasonable 
procedures in place to provide written notice to its members each time 
a change is proposed to the incorporated rules of another SRO in order 
to provide its members with notice of a proposed rule change that 
affects their interests, so that they would have an opportunity to 
comment on it.
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    \11\ See, e.g., Securities Exchange Act Release No. 49260 
(February 17, 2004), 69 FR 8500 (February 24, 2004). See also 
Securities Exchange Act Release Nos. 57478 (March 12, 2008), 73 FR 
14521, 14539-40 (March 18, 2008) (order approving SR-NASDAQ-2007-004 
and SR-NASDAQ-2007-080) and 53128 (January 13, 2006), 71 FR 3550, 
3565-66 (January 23, 2006) (File No. 10-131) (approving NASDAQ's 
application for registration as a national securities exchange). See 
also Securities Exchange Act Release No. 95445 (August 8, 2022), 87 
FR 49894 (August 12, 2022) (SR-MEMX-2022-10) (approving MEMX to 
adopt rules to govern the trading of options on the Exchange for a 
new facility called MEMX Options).
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    In connection with this proposal, the Exchange respectfully 
requests, pursuant to Rule 240.0-12 under the Act,\12\ an exemption 
under Section 36 of the Act from the rule filing requirements of 
Section 19(b) of the Act for changes to those MIAX rules that are 
effected solely by virtue of a change to cross-referenced Cboe rules 
with respect to position limits on micro narrow-based index options. 
The Exchange proposes to incorporate by reference categories of rules 
(rather than individual rules within a category) that are not trading 
rules. The Exchange also agrees to provide written notice to Members of 
the specific Cboe rules that it will incorporate by reference. In 
addition, the Exchange will notify Members whenever Cboe proposes a 
change to the cross-referenced Cboe rules with respect to position 
limits for micro narrow-based index options.\13\ For the foregoing 
reasons, the Exchange believes that its request for exemptive relief is 
consistent with prior requests for, and provision of, similar exemptive 
relief. The Exchange notes that other options exchanges were approved 
by the Commission to incorporate by reference the applicable rules of 
Cboe with respect to position limits for micro narrow-based index 
options.\14\
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    \12\ 17 CFR 240.0-12.
    \13\ The Exchange will provide such notice through a Regulatory 
Circular posted on the Exchange's website.
    \14\ See Securities Exchange Act Release No. 95445 (August 8, 
2022), 87 FR 49894 (August 22, 2022) (SR-MEMX-2022-10) (Notice of 
Filing of Amendment No. 1 and Order Granting Accelerated Approval of 
a Proposed Rule Change, as Modified by Amendment No. 1, To Adopt 
Rules To Govern the Trading of Options on the Exchange for a New 
Facility Called MEMX Options).
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Proposed Exercise Limits for Micro Narrow-Based Index Options
    The Exchange proposes to amend Exchange Rule 1807(a) to provide 
that exercise limits for micro narrow-based index options shall be 
equivalent to the position limits prescribed for micro narrow-based 
index options with the nearest expiration date in proposed Exchange 
Rule 1805B. The Exchange notes that this approach to the proposed 
exercise limits for micro narrow-based index options is consistent with

[[Page 30181]]

determining exercise limits for broad-based index options, industry 
index options, and foreign currency index options, which are equivalent 
to the corresponding position limits prescribed for the above options 
contracts with the nearest expiration date in Exchange Rules 1804, 
1805, and 1805A respectively. The Exchange also notes that other 
options exchanges have similar rules regarding exercise limits for 
micro narrow-based index options.\15\
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    \15\ See MEMX Rule 29.9(a), available at https://info.memxtrading.com/wp-content/uploads/2025/05/MEMX-Rulebook-5.14.25-clean.pdf (last visited June 9, 2025); see also Cboe BZX 
Exchange, Inc. (``BZX'') Rule 29.9, available at https://cdn.cboe.com/resources/regulation/rule_book/BZX_Exchange_Rulebook.pdf?_gl=1o*_up*MQ..*_ga*MjYxODk3MjQ1LjE3NDk0ODk5NTI.*_ga_5Q99WB9X71*czE3NDk0ODk5NTEkbzEkZzAkdDE3NDk0ODk5NTEkajYwJGwwJGgw (last visited June 9, 2025).
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    The Exchange represents that it has in place adequate surveillance 
procedures to monitor trading in micro narrow-based index options in 
order to ensure the maintenance of fair and orderly markets. The 
surveillance program includes real-time patterns for price and volume 
movements and post-trade surveillance patterns (e.g., spoofing, marking 
the close, pinging, and phishing). The Exchange will apply those same 
program procedures to trading in micro narrow-based index options. The 
Exchange will review activities in the underlying components of the 
micro narrow-based indexes when conducting surveillances for market 
abuse or manipulation in the options on micro narrow-based indexes. 
Additionally, the Exchange is a member of the Intermarket Surveillance 
Group (``ISG'') under the Intermarket Surveillance Group Agreement. ISG 
members work together to coordinate surveillance and investigative 
information sharing in the stock, options, and futures markets. In 
addition to obtaining surveillance data from the Exchange's affiliates, 
MIAX PEARL, LLC (``MIAX Pearl''), MIAX Emerald, LLC (``MIAX Emerald''), 
and MIAX Sapphire, LLC (``MIAX Sapphire''), the Exchange will be able 
to obtain information from Cboe, NYSE American LLC (``NYSE American''), 
and other markets through ISG. The Exchange also has a Regulatory 
Services Agreement with Financial Industry Regulatory Authority 
(``FINRA''). Pursuant to a multi-party 17d-2 joint plan, all options 
exchanges allocate regulatory responsibilities to FINRA to conduct 
certain options-related market surveillance that are common to rules of 
all options exchanges.
2. Statutory Basis
    The Exchange believes that the proposed changes are consistent with 
Section 6(b) of the Act \16\ in general, and further the objectives of 
Section 6(b)(5) of the Act,\17\ in particular, in that it is designed 
to prevent fraudulent and manipulative acts and practices, to promote 
just and equitable principles of trade, to foster cooperation and 
coordination with persons engaged in regulating, clearing, settling, 
processing information with respect to, and facilitating transactions 
in securities, to remove impediments to and perfect the mechanisms of a 
free and open market and a national market system and, in general, to 
protect investors and the public interest.
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    \16\ 15 U.S.C. 78f(b).
    \17\ 15 U.S.C. 78f(b)(5).
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    The Exchange believes that the proposal to adopt the definition and 
listing and maintenance criteria for micro narrow-based indexes expand 
the Exchange's capability to introduce and trade both existing and new 
and innovative index products on the Exchange System. The added 
capability is consistent with the Act in that it should foster 
cooperation and coordination with persons engaged in regulating, 
clearing, settling, processing information with respect to, and 
facilitating transactions in securities, specifically options on micro 
narrow-based indexes. The Exchange believes that there may be unmet 
market demand on the Exchange for exchange-listed options on micro 
narrow-based indexes and the listing and trading of options on micro 
narrow-based indexes on the Exchange is designed to attract both 
liquidity and order flow to the Exchange, all to the benefit of the 
marketplace as a whole.
    The Exchange believes that the requirements in the proposed listing 
standards regarding, among other things, the minimum market 
capitalization, trading volume, and relative weightings of an 
underlying index's component stocks are designed to ensure that the 
markets for the index's component stocks are adequately capitalized and 
sufficiently liquid, and that no one stock dominates the index. These 
requirements are designed to remove impediments to and perfect the 
mechanisms of a free and open market and a national market system and, 
in general, to protect investors and the public interest, by ensuring 
that unusual or extreme volatility in any single component of an index 
could not cause the entire index to become so volatile that it puts 
investors at undue and unplanned risk. These requirements also minimize 
the potential for manipulating the underlying index, which protects 
investors and the public interest.
    The Exchange further believes that the requirement in proposed 
Exchange Rule 1802(f)(8) that the current underlying index value will 
be reported at least once every 15 seconds during the time the index 
options are traded on the Exchange, and the requirement in proposed 
Rule 1802(g)(6) that the current underlying index value will be 
reported at least once every 15 seconds during the time the index 
options are traded on the Exchange removes impediments to the perfects 
the mechanisms of a free and open market and a national market system 
by providing transparency with respect to current index values and by 
contributing to the overall transparency of the market for index 
options. In addition, the Exchange believes that the requirement in 
proposed Rule 1802(f)(12) that cash settled index options are 
designated as A.M.-settled, rather than based on closing prices, should 
help to reduce the potential impact of expiring index options on the 
market for an index's component securities.
    The Exchange's proposal to adopt Exchange Rule 1805B relating to 
position limits for micro narrow-based index options is designed to 
remove impediments to and perfect the mechanisms of a free and open 
market and a national market system and, in general, to protect 
investors and the public interest, by limiting investors' levels of 
concentration in a single index position. Not only would an investor be 
at undue risk by assuming such a position, but the market for the 
affected index option could be disproportionately affected by the 
trading activities of that single investor with an unusually large long 
or short position. The Exchange proposes to mitigate this risk by 
incorporating by reference the applicable rules of Cboe with respect to 
position limits for micro narrow-based index options traded on the 
Exchange and also on Cboe, which rules are designed for the protection 
of investors and the public interest. The Exchange notes that the 
proposed rule change is substantively similar to other option 
exchanges' rules regarding position limits for micro narrow-based index 
options.\18\
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    \18\ See supra note 10.
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    The Exchange's proposal to amend Exchange Rule 1807 relating to 
exercise limits for micro narrow-based index options is designed to 
remove

[[Page 30182]]

impediments to and perfect the mechanisms of a free and open market and 
a national market system and, in general, to protect investors and the 
public interest, by imposing limits on the aggregate number of options 
contracts that a Member could exercise. This is to minimize the 
potential for mini-manipulations and for corners or squeezes of the 
underlying market. In addition, such limits serve to reduce the 
possibility for disruption of the options market itself, especially in 
illiquid options classes. The Exchange also notes that other options 
exchanges have similar rules regarding exercise limits for micro 
narrow-based index options.\19\
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    \19\ See supra note 15.
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    The Exchange believes that the proposed changes to the hierarchical 
headings in the Exchange Rule 1801 and the cross reference in Exchange 
Rule 1802(a) will promote just and equitable principles of trade and 
remove impediments to and perfect the mechanism of a free and open 
market and a national market system because the proposed rule changes 
will provide consistency and clarity in the Rulebook regarding the 
definitions and rule filing requirements that are applicable to index 
options. It is in the public interest for the Exchange's Rulebook to 
accurate.

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

    The Exchange does not believe that the proposed rule change will 
result in any burden on competition that is not necessary or 
appropriate in furtherance of the purposes of the Act.
Intra-Market Competition
    The Exchange believes the proposed change will not impose any 
burden on intra-market competition that is not necessary or appropriate 
in furtherance of the purposes of the Act as the proposed rule change 
is substantively similar to rules already in place governing the 
listing and trading of options on micro narrow-based indexes at other 
exchanges.\20\ Further, any micro narrow-based index options that the 
Exchange would list would be available to all market participants. The 
proposed rule changes will provide all investors that participate in 
the micro narrow-based index options market greater trading and hedging 
opportunities and flexibility to meet their investment and hedging 
needs. The proposed rule changes will facilitate the listing and 
trading of new index option products that will enhance competition 
among market participants, to the benefit of investors and the 
marketplace. The Exchange further believes that the proposed rule 
changes will enhance intra-market competition, as more varied index 
products become available for trading on the Exchange, which should 
encourage a greater number of Market Makers \21\ to trade options on 
micro narrow-based indexes, resulting in greater liquidity and more 
competitive quoting on the Exchange.
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    \20\ See supra notes 6, 7, 10 and 15.
    \21\ The term ``Market Makers'' refers to ``Lead Market 
Makers,'' ``Primary Lead Market Makers,'' and ``Registered Market 
Makers'' collectively. See Exchange Rule 100.
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Inter-Market Competition
    The Exchange does not believe the proposal will impose any burden 
on inter-market competition that is not necessary or appropriate in 
furtherance of the purposes of the Act as the Exchange believes that 
the proposed rule change will enable the Exchange to compete for order 
flow in options on micro narrow-based indexes with other exchanges that 
currently have rules and functionality in place to list and trade 
options on micro narrow-based indexes. The proposal would enhance 
competition by providing investors with additional investment vehicles, 
in a fully-electronic trading environment, through which investors can 
gain and hedge exposure to micro narrow-based indexes. The Exchange 
notes that other options exchanges provide similar requirements for 
options on a micro narrow-based index.\22\
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    \22\ See supra notes 6, 7, 10, and 15.
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    The Exchange does not believe that the proposed changes to the 
hierarchical headings in Exchange Rule 1801 and the cross reference in 
Exchange Rule 1802(a) will impose any burden on competition not 
necessary or appropriate in furtherance of the purposes of the Act. 
Specifically, the Exchange believes the proposed changes will not 
impose any burden on intra-market because the rules of the Exchange 
apply to all Members equally. The proposed rule changes to the 
hierarchical headings and the cross reference will have no impact on 
inter-market competition as they are not designed to address any 
competitive issue but rather are designed to provide added clarity to 
the Rulebook regarding the definitions and rule filing requirements 
that are applicable to index options.

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

    Written comments were neither solicited nor received.

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

    Within 45 days of the date of publication of this notice in the 
Federal Register or within such longer period up to 90 days (i) as the 
Commission may designate if it finds such longer period to be 
appropriate and publishes its reasons for so finding or (ii) as to 
which the Exchange consents, the Commission will: (a) by order approve 
or disapprove such proposed rule change, or (b) institute proceedings 
to determine whether the proposed rule change should be 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

     Use the Commission's internet comment form (https://www.sec.gov/rules/sro.shtml); or
     Send an email to [email protected]. Please include 
File Number SR-MIAX-2025-27 on the subject line.

Paper Comments

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

All submissions should refer to file number SR-MIAX-2025-27. 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 (https://www.sec.gov/rules/sro.shtml). Copies of the submission, all subsequent amendments, all 
written statements with respect to the proposed rule change that are 
filed with the Commission, and all written communications relating to 
the proposed rule change between the Commission and any person, other 
than those that may be withheld from the public in accordance with the 
provisions of 5 U.S.C. 552, will be available for website viewing and 
printing in the Commission's Public Reference Room, 100 F Street NE, 
Washington, DC 20549, on official business days between the hours of 10 
a.m. and 3 p.m. Copies of the filing also will be available for 
inspection and

[[Page 30183]]

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-MIAX-2025-27 and should be submitted on 
or before July 29, 2025.

    For the Commission, by the Division of Trading and Markets, 
pursuant to delegated authority.\23\
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    \23\ 17 CFR 200.30-3(a)(12).
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J. Matthew DeLesDernier,
Deputy Secretary.
[FR Doc. 2025-12636 Filed 7-7-25; 8:45 am]
BILLING CODE 8011-01-P