[Federal Register Volume 89, Number 86 (Thursday, May 2, 2024)]
[Notices]
[Pages 35909-35918]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2024-09470]


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SECURITIES AND EXCHANGE COMMISSION

[Release No. 34-100036; File No. SR-MIAX-2024-22]


Self-Regulatory Organizations; Miami International Securities 
Exchange, LLC; Notice of Filing and Immediate Effectiveness of a 
Proposed Rule Change To Amend Its Fee Schedule for Purge Ports

April 26, 2024.
    Pursuant to Section 19(b)(1) of the Securities Exchange Act of 1934

[[Page 35910]]

(``Act''),\1\ and Rule 19b-4 thereunder,\2\ notice is hereby given that 
on April 15, 2024, 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, 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 amend the MIAX Options Exchange Fee 
Schedule (the ``Fee Schedule'') to amend fees for Purge Ports.\3\
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    \3\ The proposed fee change is based on a recent proposal by 
Nasdaq Phlx LLC (``Phlx'') to adopt fees for purge ports. See 
Securities Exchange Act Release No. 97825 (June 30, 2023), 88 FR 
43405 (July 7, 2023) (SR-Phlx-2023-28).
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    The text of the proposed rule change is available on the Exchange's 
website at https://www.miaxglobal.com/markets/us-options/miax-options/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 amend the fees for Purge Ports, which is a 
function enabling Market Makers \4\ to cancel all open quotes or a 
subset of open quotes through a single cancel message. The Exchange 
currently provides Market Makers the option to purchase Purge Ports to 
assist in their quoting activity. Purge Ports provide Market Makers 
with the ability to send purge messages to the Exchange System.\5\ 
Purge Ports are not capable of sending or receiving any other type of 
messages or information. The use of Purge Ports is completely optional 
and no rule or regulation requires that a Market Maker utilize them.
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    \4\ The term ``Market Makers'' refers to Lead Market Makers 
(``LMMs''), Primary Lead Market Makers (``PLMMs''), and Registered 
Market Makers (``RMMs'') collectively. See Exchange Rule 100.
    \5\ 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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    The Exchange initially filed the proposal on September 29, 2023 
(the ``Initial Proposal'').\6\ On November 22, 2023, the Exchange 
withdrew the Initial Proposal and replaced with a revised filing (the 
``Second Proposal'').\7\ On January 17, 2024, the Exchange withdrew the 
Second Proposal and, on January 31, 2024, replaced it with a further 
revised filing (the ``Third Proposal'').\8\ On March 8, 2024, the 
Exchange withdrew the Third Proposal and replaced it with a further 
revised filing (the ``Fourth Proposal'').\9\ On April 15, 2024, the 
Exchange withdrew the Fourth Proposal and replaced it with a further 
revised filing (the ``Fifth Proposal'').
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    \6\ See Securities Exchange Act Release No. 98732 (October 12, 
2023), 88 FR 71913 (October 18, 2023) (SR-MIAX-2023-37).
    \7\ See Securities Exchange Act Release No. 99088 (December 5, 
2023), 88 FR 85958 (December 11, 2023) (SR-MIAX-2023-43).
    \8\ See Securities Exchange Act Release No. 99526 (February 13, 
2024), 89 FR 12898 (February 20, 2024) (SR-MIAX-2024-07).
    \9\ See Securities Exchange Act Release No. 99813 (March 20, 
2024), 89 FR 21140 (March 26, 2024) (SR-MIAX-2024-14).
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    The Exchange is including a cost analysis in this filing to justify 
the proposed fees. As described more fully below, the cost analysis 
includes, among other things, descriptions of how the Exchange 
allocated costs among it and its affiliated exchanges for similar 
proposed fee changes (separately between MIAX Pearl Options \10\ and 
MIAX Emerald,\11\ collectively referred to herein as the ``affiliated 
markets''), to ensure no cost was allocated more than once, as well as 
detail supporting its cost allocation processes and explanations as to 
why a cost allocation in this proposal may differ from the same cost 
allocation in similar proposals submitted by the affiliated markets. 
The proposed fees are intended to cover the Exchange's cost of 
providing Purge Ports with a reasonable mark-up over those costs.
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    \10\ MIAX Pearl Options is the options market of MIAX PEARL, LLC 
(``MIAX Pearl''), which also operates an equities trading facility 
called MIAX Pearl Equities. See Exchange Rule 100 and MIAX Pearl 
Rule 1901.
    \11\ The term ``MIAX Emerald'' means MIAX Emerald, LLC. See 
Exchange Rule 100.
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Purge Port Fee Change
    Unlike other options exchanges that charge fees for Purge Ports on 
a per port basis,\12\ the Exchange assesses a flat fee of $1,500 per 
month, regardless of the number of Purge Ports utilized by a Market 
Maker. Prior to the Initial Proposal, a Market Maker could request and 
be allocated two (2) Purge Ports per Matching Engine \13\ to which it 
connects and not all Market Makers connected to all of the Exchange's 
Matching Engines.
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    \12\ See Cboe BXZ Exchange, Inc. (``BZX'') Options Fee Schedule, 
Options Logical Port Fees, Purge Ports ($750 per purge port per 
month); Cboe EDGX Exchange, Inc. (``EDGX'') Options Fee Schedule, 
Options Logical Port Fees, Purge Ports ($750 per purge port per 
month); Cboe Exchange, Inc. (``Cboe'') Fee Schedule ($850 per purge 
port per month). See also Nasdaq GEMX, Options 7, Pricing Schedule, 
Section 6.C.(3). Nasdaq GEMX, LLC (``Nasdaq GEMX'') assesses its 
members $1,250 per SQF Purge Port per month, subject to a monthly 
cap of $17,500 for SQF Purge Ports and SQF Ports, applicable to 
market makers. See also Securities Exchange Act Release No. 97825 
(June 30, 2023), 88 FR 43405 (July 7, 2023) (SR-Phlx-2023-28).
    \13\ A Matching Engine is a part of the MIAX electronic system 
that processes options quotes and trades on a symbol-by-symbol 
basis. Some matching engines will process option classes with 
multiple root symbols, and other matching engines will be dedicated 
to one single option root symbol (for example, options on SPY will 
be processed by one single matching engine that is dedicated only to 
SPY). A particular root symbol may only be assigned to a single 
designated matching engine. A particular root symbol may not be 
assigned to multiple matching engines. See Fee Schedule, Section 
5)d), note 29.
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    The Exchange now proposes to amend the fee for Purge Ports to align 
more closely with other exchanges who charge on a per port basis by 
providing two (2) Purge Ports per Matching Engine for a monthly flat 
fee of $300 per month per Matching Engine. The only difference with a 
per port structure is that Market Makers receive two (2) Purge Ports 
per Matching Engine for the same proposed monthly fee, rather than 
being charged a separate fee for each Purge Port. The Exchange proposes 
to charge the proposed fee for Purge Ports per Matching Engine, instead 
on a per Purge Port basis, due to its System architecture which 
provides two (2) Purge Ports per Matching Engine for redundancy 
purposes. In addition, the proposed fee is lower than the comparable 
fee charged by competing exchanges that also charge on a per port 
basis, notwithstanding that the Exchange is providing up to two (2) 
Purge Ports for that same lower fee.\14\ Other exchanges may also 
maintain a different number of matching engines within their 
architecture than the Exchange (i.e., MIAX maintains twenty-

[[Page 35911]]

four (24) matching engines, MIAX Pearl Options maintains twelve (12) 
matching engines, and MIAX Emerald maintains twelve (12) matching 
engines).
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    \14\ See supra note 12.
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    Similar to a per port charge, Market Makers are able to select the 
Matching Engines that they want to connect to,\15\ based on the 
business needs of each Market Maker, and pay the applicable fee based 
on the number of Matching Engines and ports utilized. The Exchange 
believes that the proposed fee provides Market Makers with flexibility 
to control their Purge Port costs based on the number of Matching 
Engines each Marker Maker elects to connect to based on each Market 
Maker's business needs.
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    \15\ The Exchange notes that each Matching Engine corresponds to 
a specified group of symbols. Certain Market Makers choose to only 
quote in certain symbols while other Market Makers choose to quote 
the entire market.
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* * * * *
    A logical port represents a port established by the Exchange within 
the Exchange's System for trading and billing purposes. Each logical 
port grants a Member \16\ the ability to accomplish a specific 
function, such as order entry, order cancellation, access to execution 
reports, and other administrative information.
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    \16\ 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.
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    Purge Ports are designed to assist Market Makers \17\ in the 
management of, and risk control over, their quotes, particularly if the 
firm is dealing with a large number of securities. For example, if a 
Market Maker detects market indications that may influence the 
execution potential of their quotes, the Market Maker may use Purge 
Ports to reduce uncertainty and to manage risk by purging all quotes in 
a number of securities. This allows Market Makers to seamlessly avoid 
unintended executions, while continuing to evaluate the market, their 
positions, and their risk levels. Purge Ports are used by Market Makers 
that conduct business activity that exposes them to a large amount of 
risk across a number of securities. Purge Ports enable Market Makers to 
cancel all open quotes, or a subset of open quotes through a single 
cancel message. The Exchange notes that Purge Ports increase efficiency 
of already existing functionality enabling the cancellation of quotes.
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    \17\ Members seeking to become registered as a Market Maker must 
comply with the applicable requirements of Chapter VI of the 
Exchange's Rules.
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    The Exchange operates highly performant systems with significant 
throughput and determinism which allows participants to enter, update 
and cancel quotes at high rates. Market Makers may currently cancel 
individual quotes through the existing functionality, such as through 
the use of a mass cancel message by which a Market Maker may request 
that the Exchange remove all or a subset of its quotations and block 
all or a subset of its new inbound quotations.\18\ Other than Purge 
Ports being a dedicated line for cancelling quotations, Purge Ports 
operate in the same manner as a mass cancel message being sent over a 
different type of port. For example, like Purge Ports, mass 
cancellations sent over a logical port may be done at either the firm 
or MPID level. As a result, Market Makers can currently cancel quotes 
in rapid succession across their existing logical ports \19\ or through 
a single cancel message, all open quotes or a subset of open quotes.
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    \18\ See Exchange Rule 519C(a) and (b).
    \19\ Current Exchange port functionality supports cancelation 
rates that exceed one thousand messages per second and the 
Exchange's research indicates that certain market participants rely 
on such functionality and at times utilize such cancelation rates.
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    Similarly, Market Makers may also use cancel-on-disconnect control 
when they experience a disruption in connection to the Exchange to 
automatically cancel all quotes, as configured or instructed by the 
Member or Market Maker.\20\ In addition, the Exchange already provides 
similar ability to mass cancel quotes through the Exchange's risk 
controls, which are offered at no charge and enables Market Makers to 
establish pre-determined levels of risk exposure, and can be used to 
cancel all open quotes.\21\ Accordingly, the Exchange believes that the 
Purge Ports provide an efficient option as an alternative to already 
available services and enhance the Market Maker's ability to manage 
their risk.
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    \20\ See Exchange Rule 519C(c).
    \21\ See Exchange Rule 532.
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    The Exchange believes that market participants benefit from a 
dedicated purge mechanism for specific Market Makers and to the market 
as a whole. Market Makers will have the benefit of efficient risk 
management and purge tools. The market will benefit from potential 
increased quoting and liquidity as Market Makers may use Purge Ports to 
manage their risk more robustly. Only Market Makers that request Purge 
Ports would be subject to the proposed fees, and other Market Makers 
can continue to operate in exactly the same manner as they do today 
without dedicated Purge Ports, but with the additional purging 
capabilities described above.
Implementation Date
    The proposed fee change is immediately effective.
2. Statutory Basis
    The Exchange believes that the proposed rule change is consistent 
with Section 6(b) of the Act,\22\ in general, and furthers the 
objectives of Section 6(b)(5) of the Act,\23\ in particular, in that it 
is not designed to permit unfair discrimination among customers, 
brokers, or dealers. The Exchange also believes that its proposed fee 
is consistent with Section 6(b)(4) of the Act \24\ because it 
represents an equitable allocation of reasonable dues, fees and other 
charges among market participants.
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    \22\ 15 U.S.C. 78f(b).
    \23\ 15 U.S.C. 78f(b)(5).
    \24\ 15 U.S.C. 78f(b)(4).
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Cost Analysis
    In general, the Exchange believes that exchanges, in setting fees 
of all types, should meet very high standards of transparency to 
demonstrate why each new fee or fee increase meets the Exchange Act 
requirements that fees be reasonable, equitably allocated, not unfairly 
discriminatory, and not create an undue burden on competition among 
members and markets. In particular, the Exchange believes that each 
exchange should take extra care to be able to demonstrate that these 
fees are based on its costs and reasonable business needs.
    In proposing to charge fees for port services, the Exchange is 
especially diligent in assessing those fees in a transparent way 
against its own aggregate costs of providing the related service, and 
in carefully and transparently assessing the impact on Members--both 
generally and in relation to other Members, i.e., to assure the fee 
will not create a financial burden on any participant and will not have 
an undue impact in particular on smaller Members and competition among 
Members in general. The Exchange believes that this level of diligence 
and transparency is called for by the requirements of Section 19(b)(1) 
under the Act,\25\ and Rule 19b-4 thereunder,\26\ with respect to the 
types of information exchanges should provide when filing fee changes, 
and Section 6(b) of the Act,\27\ which requires, among other things, 
that exchange fees be reasonable

[[Page 35912]]

and equitably allocated,\28\ not designed to permit unfair 
discrimination,\29\ and that they not impose a burden on competition 
not necessary or appropriate in furtherance of the purposes of the 
Act.\30\ This rule change proposal addresses those requirements, and 
the analysis and data in each of the sections that follow are designed 
to clearly and comprehensively show how they are met. The Exchange 
notes that the legacy exchanges with whom the Exchange vigorously 
competes for order flow and market share, were not subject to any such 
diligence or transparency in setting their baseline non-transaction 
fees, most of which were put in place before the Staff Guidance.\31\
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    \25\ 15 U.S.C. 78s(b)(1).
    \26\ 17 CFR 240.19b-4.
    \27\ 15 U.S.C. 78f(b).
    \28\ 15 U.S.C. 78f(b)(4).
    \29\ 15 U.S.C. 78f(b)(5).
    \30\ 15 U.S.C. 78f(b)(8).
    \31\ See Staff Guidance on SRO Rule Filings Relating to Fees 
(May 21, 2019), available athttps://www.sec.gov/tm/staff-guidance-sro-rule-filings-fees (the ``Staff Guidance'').
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    As detailed below, the Exchange recently calculated its aggregate 
annual costs for providing Purge Ports to be $910,413 (or approximately 
$75,868 per month, rounded to the nearest dollar when dividing the 
annual cost by 12 months). In order to cover the aggregate costs of 
providing Purge Ports to its Market Makers going forward and to make a 
modest profit, as described below, the Exchange proposes to modify its 
Fee Schedule to charge a fee of $300 per Matching Engine for Purge 
Ports.
    In 2019, the Exchange completed a study of its aggregate costs to 
produce market data and connectivity (the ``Cost Analysis'').\32\ The 
Cost Analysis required a detailed analysis of the Exchange's aggregate 
baseline costs, including a determination and allocation of costs for 
core services provided by the Exchange--transaction execution, market 
data, membership services, physical connectivity, and port access 
(which provide order entry, cancellation and modification 
functionality, risk and purge functionality, the ability to receive 
drop copies, and other functionality). The Exchange separately divided 
its costs between those costs necessary to deliver each of these core 
services, including infrastructure, software, human resources (i.e., 
personnel), and certain general and administrative expenses (``cost 
drivers''). The Exchange recently update its Cost Analysis using its 
2024 estimated budget as described below.
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    \32\ The Exchange frequently updates it Cost Analysis as 
strategic initiatives change, costs increase or decrease, and market 
participant needs and trading activity changes. The Exchange's most 
recent Cost Analysis was conducted ahead of this filing.
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    As an initial step, the Exchange determined the total cost for the 
Exchange and the affiliated markets for each cost driver as part of its 
2024 budget review process. The 2024 budget review is a company-wide 
process that occurs over the course of many months, includes meetings 
among senior management, department heads, and the Finance Team. Each 
department head is required to send a ``bottom up'' budget to the 
Finance Team allocating costs at the profit and loss account and vendor 
levels for the Exchange and its affiliated markets based on a number of 
factors, including server counts, additional hardware and software 
utilization, current or anticipated functional or non-functional 
development projects, capacity needs, end-of-life or end-of-service 
intervals, number of members, market model (e.g., price time or pro-
rata, simple only or simple and complex markets, auction functionality, 
etc.), which may impact message traffic, individual system 
architectures that impact platform size,\33\ storage needs, dedicated 
infrastructure versus shared infrastructure allocated per platform 
based on the resources required to support each platform, number of 
available connections, and employees allocated time. All of these 
factors result in different allocation percentages among the Exchange 
and its affiliated markets, i.e., the different percentages of the 
overall cost driver allocated to the Exchange and its affiliated 
markets will cause the dollar amount of the overall cost allocated 
among the Exchange and its affiliated markets to also differ. Because 
the Exchange's parent company currently owns and operates four separate 
and distinct marketplaces, the Exchange must determine the costs 
associated with each actual market--as opposed to the Exchange's parent 
company simply concluding that all costs drivers are the same at each 
individual marketplace and dividing total cost by four (4) (evenly for 
each marketplace). Rather, the Exchange's parent company determines an 
accurate cost for each marketplace, which results in different 
allocations and amounts across exchanges for the same cost drivers, due 
to the unique factors of each marketplace as described above. This 
allocation methodology also ensures that no cost would be allocated 
twice or double-counted between the Exchange and its affiliated 
markets. The Finance Team then consolidates the budget and sends it to 
senior management, including the Chief Financial Officer and Chief 
Executive Officer, for review and approval. Next, the budget is 
presented to the Board of Directors and the Finance and Audit 
Committees for each exchange for their approval. The above steps 
encompass the first step of the cost allocation process.
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    \33\ For example, MIAX maintains 24 matching engines, MIAX Pearl 
Options maintains 12 matching engines, MIAX Pearl Equities maintains 
24 matching engines, and MIAX Emerald maintains 12 matching engines.
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    The next step involves determining what portion of the cost 
allocated to the Exchange pursuant to the above methodology is to be 
allocated to each core service, e.g., connectivity and ports, market 
data, and transaction services. The Exchange and its affiliated markets 
adopted an allocation methodology with thoughtful and consistently 
applied principles to guide how much of a particular cost amount 
allocated to the Exchange should be allocated within the Exchange to 
each core service. This is the final step in the cost allocation 
process and is applied to each of the cost drivers set forth below.
    This next level of the allocation methodology at the individual 
exchange level also took into account factors similar to those set 
forth under the first step of the allocation methodology process 
described above, to determine the appropriate allocation to 
connectivity or market data versus allocations for other services. This 
allocation methodology was developed through an assessment of costs 
with senior management intimately familiar with each area of the 
Exchange's operations. After adopting this allocation methodology, the 
Exchange then applied an allocation of each cost driver to each core 
service, resulting in the cost allocations described below. Each of the 
below cost allocations is unique to the Exchange and represents a 
percentage of overall cost that was allocated to the Exchange pursuant 
to the initial allocation described above.
    By allocating segmented costs to each core service, the Exchange 
was able to estimate by core service the potential margin it might earn 
based on different fee models. The Exchange notes that as a non-listing 
venue it has five primary sources of revenue that it can potentially 
use to fund its operations: transaction fees, fees for connectivity and 
port services, membership fees, regulatory fees, and market data fees. 
Accordingly, the Exchange must cover its expenses from these five 
primary sources of revenue. The Exchange also notes that as a general 
matter each of these sources of revenue is based on services that are 
interdependent. For instance, the Exchange's system for executing 
transactions is dependent on physical hardware and connectivity;

[[Page 35913]]

only Members and parties that they sponsor to participate directly on 
the Exchange may submit orders to the Exchange; many Members (but not 
all) consume market data from the Exchange in order to trade on the 
Exchange; and, the Exchange consumes market data from external sources 
in order to comply with regulatory obligations. Accordingly, given this 
interdependence, the allocation of costs to each service or revenue 
source required judgment of the Exchange and was weighted based on 
estimates of the Exchange that the Exchange believes are reasonable, as 
set forth below. While there is no standardized and generally accepted 
methodology for the allocation of an exchange's costs, the Exchange's 
methodology is the result of an extensive review and analysis and will 
be consistently applied going forward for any other potential fee 
proposals. In the absence of the Commission attempting to specify a 
methodology for the allocation of exchanges' interdependent costs, the 
Exchange will continue to be left with its best efforts to attempt to 
conduct such an allocation in a thoughtful and reasonable manner.
    Through the Exchange's extensive updated Cost Analysis, which was 
again recently further refined, the Exchange analyzed every expense 
item in the Exchange's general expense ledger to determine whether each 
such expense relates to the provision of connectivity and port 
services, and, if such expense did so relate, what portion (or 
percentage) of such expense actually supports the provision of Purge 
Port services, and thus bears a relationship that is, ``in nature and 
closeness,'' directly related to Purge Port services. In turn, the 
Exchange allocated certain costs more to physical connectivity and 
others to ports, while certain costs were only allocated to such 
services at a very low percentage or not at all, using consistent 
allocation methodologies as described above. Based on this analysis, 
the Exchange estimates that the aggregate monthly cost to provide Purge 
Port services is $75,868, as further detailed below.
Costs Related to Offering Purge Ports
    The following chart details the individual line-item costs 
considered by the Exchange to be related to offering Purge Ports as 
well as the percentage of the Exchange's overall costs that such costs 
represent for each cost driver (e.g., as set forth below, the Exchange 
allocated approximately 2.2% of its overall Human Resources cost to 
offering Purge Ports).

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                                                                     Allocated         Allocated
                          Cost drivers                            annual cost \a\  monthly cost \b\    % of all
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Human Resources.................................................         $492,357           $41,030          2.2
Connectivity (external fees, cabling, switches, etc.)...........            1,036                86          1.1
Internet Services and External Market Data......................           16,081             1,340          2.1
Data Center.....................................................           31,102             2,592          2.1
Hardware and Software Maintenance and Licenses..................           42,539             3,545          2.1
Depreciation....................................................           82,610             6,884          1.9
Allocated Shared Expenses.......................................          244,688            20,391          2.8
                                                                 -----------------------------------------------
    Total.......................................................          910,413            75,868          2.3
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\a\ The Annual Cost includes figures rounded to the nearest dollar.
\b\ The Monthly Cost was determined by dividing the Annual Cost for each line item by twelve (12) months and
  rounding up or down to the nearest dollar.

    Below are additional details regarding each of the line-item costs 
considered by the Exchange to be related to offering Purge Ports. While 
some costs were attempted to be allocated as equally as possible among 
the Exchange and its affiliated markets, the Exchange notes that some 
of its cost allocation percentages for certain cost drivers differ when 
compared to the same cost drivers for the Exchange's affiliated markets 
in their similar proposed fee changes for Purge Ports. This is because 
the Exchange's cost allocation methodology utilizes the actual 
projected costs of the Exchange (which are specific to the Exchange and 
are independent of the costs projected and utilized by the Exchange's 
affiliated markets) to determine its actual costs, which may vary 
across the Exchange and its affiliated markets based on factors that 
are unique to each marketplace. The Exchange provides additional 
explanation below (including the reason for the deviation) for the 
significant differences.
Human Resources
    The Exchange notes that it and its affiliated markets anticipate 
that by year-end 2024, there will be 289 employees (excluding employees 
at non-options/equities exchange subsidiaries of Miami International 
Holdings, Inc. (``MIH''), the holding company of the Exchange and its 
affiliated markets), and each department leader has direct knowledge of 
the time spent by each employee with respect to the various tasks 
necessary to operate the Exchange. Specifically, twice a year, and as 
needed with additional new hires and new project initiatives, in 
consultation with employees as needed, managers and department heads 
assign a percentage of time to every employee and then allocate that 
time amongst the Exchange and its affiliated markets to determine each 
market's individual Human Resources expense. Then, managers and 
department heads assign a percentage of each employee's time allocated 
to the Exchange into buckets including network connectivity, ports, 
market data, and other exchange services. This process ensures that 
every employee is 100% allocated, ensuring there is no double counting 
between the Exchange and its affiliated markets.
    For personnel costs (Human Resources), the Exchange calculated an 
allocation of employee time for employees whose functions include 
providing and maintaining Purge Ports and performance thereof 
(primarily the Exchange's network infrastructure team, which spends 
most of their time performing functions necessary to provide port and 
connectivity services). As described more fully above, the Exchange's 
parent company allocates costs to the Exchange and its affiliated 
markets and then a portion of the Human Resources costs allocated to 
the Exchange is then allocated to port services. From that portion 
allocated to the Exchange that applied to ports, the Exchange then 
allocated a weighted average of 2.7% of each employee's time from the 
above group to Purge Ports.
    The Exchange also allocated Human Resources costs to provide Purge 
Ports to a limited subset of personnel with ancillary functions related 
to establishing and maintaining such ports

[[Page 35914]]

(such as information security, sales, membership, and finance 
personnel). The Exchange allocated cost on an employee-by-employee 
basis (i.e., only including those personnel who support functions 
related to providing Purge Ports) and then applied a smaller allocation 
to such employees' time to Purge Ports (1.2%). This other group of 
personnel with a smaller allocation of Human Resources costs also have 
a direct nexus to Purge Ports, whether it is a sales person selling 
port services, finance personnel billing for port services or providing 
budget analysis, or information security ensuring that such ports are 
secure and adequately defended from an outside intrusion.
    The estimates of Human Resources cost were therefore determined by 
consulting with such department leaders, determining which employees 
are involved in tasks related to providing Purge Ports, and confirming 
that the proposed allocations were reasonable based on an understanding 
of the percentage of time such employees devote to those tasks. This 
includes personnel from the Exchange departments that are predominately 
involved in providing Purge Ports: Business Systems Development, 
Trading Systems Development, Systems Operations and Network Monitoring, 
Network and Data Center Operations, Listings, Trading Operations, and 
Project Management. Again, the Exchange allocated 2.7% of each of their 
employee's time assigned to the Exchange for Purge Ports, as stated 
above. Employees from these departments perform numerous functions to 
support Purge Ports, such as the installation, re-location, 
configuration, and maintenance of Purge Ports and the hardware they 
access. This hardware includes servers, routers, switches, firewalls, 
and monitoring devices. These employees also perform software upgrades, 
vulnerability assessments, remediation and patch installs, equipment 
configuration and hardening, as well as performance and capacity 
management. These employees also engage in research and development 
analysis for equipment and software supporting Purge Ports and design, 
and support the development and on-going maintenance of internally-
developed applications as well as data capture and analysis, and Member 
and internal Exchange reports related to network and system 
performance. The above list of employee functions is not exhaustive of 
all the functions performed by Exchange employees to support Purge 
Ports, but illustrates the breath of functions those employees perform 
in support of the above cost and time allocations.
    Lastly, the Exchange notes that senior level executives' time was 
only allocated to the Purge Ports related Human Resources costs to the 
extent that they are involved in overseeing tasks related to providing 
Purge Ports. The Human Resources cost was calculated using a blended 
rate of compensation reflecting salary, equity and bonus compensation, 
benefits, payroll taxes, and 401(k) matching contributions.
Connectivity (External Fees, Cabling, Switches, etc.)
    The Connectivity cost driver includes external fees paid to connect 
to other exchanges and third parties, cabling and switches required to 
operate the Exchange. The Connectivity cost driver is more narrowly 
focused on technology used to complete connections to the Exchange and 
to connect to external markets. The Exchange notes that its 
connectivity to external markets vendors is required in order to 
receive market data to run the Exchange's matching engine and basic 
operations compliant with existing regulations, primarily Regulation 
NMS.
    The Exchange relies on various connectivity providers for 
connectivity to the entire U.S. options industry, and infrastructure 
services for critical components of the network that are necessary to 
provide and maintain its System Networks and access to its System 
Networks via 10Gb ULL connectivity. Specifically, the Exchange utilizes 
connectivity providers to connect to other national securities 
exchanges and the Options Price Reporting Authority (``OPRA''). The 
Exchange understands that these service providers provide services to 
most, if not all, of the other U.S. exchanges and other market 
participants. Connectivity provided by these service providers is 
critical to the Exchanges daily operations and performance of its 
System Networks which includes Purge Ports. Without these services 
providers, the Exchange would not be able to connect to other national 
securities exchanges, market data providers or OPRA and, therefore, 
would not be able to operate and support its System Networks, including 
Purge Ports. In addition, the connectivity is necessary for the 
Exchange to notify OPRA and other market participants that an order has 
been cancelled, and that quotes may have been cancelled as a result of 
a Member purging quotes via their Purge Port. Also, like other types of 
ports offered by the Exchange, Purge Ports leverage the Exchange's 
existing 10Gb ULL connectivity, which also relies on connectivity to 
other national securities exchanges and OPRA. The Exchange does not 
employ a separate fee to cover its connectivity provider expense and 
recoups that expense, in part, by charging for Purge Ports.
Internet Services and External Market Data
    The next cost driver consists of internet services and external 
market data. Internet services includes third-party service providers 
that provide the internet, fiber and bandwidth connections between the 
Exchange's networks, primary and secondary data centers, and office 
locations in Princeton and Miami. For purposes of Purge Ports, the 
Exchange also includes a portion of its costs related to external 
market data. External market data includes fees paid to third parties, 
including OPRA, to receive and consume market data from other markets. 
The Exchange includes external market data costs towards Purge Ports 
because such market data is necessary to offer certain services related 
to such ports, such as checking for market conditions (e.g., halted 
securities). External market data is also consumed at the Matching 
Engine level for, among other things, as validating quotes on entry 
against the national best bid or offer (``NBBO'').\34\ Purge Ports are 
a component of the Matching Engine, and used by market participants to 
cancel multiple resting quotes within the Matching Engine. While 
resting, the Exchange uses external market data to manage those quotes, 
such as preventing trade-throughs, and those quotes are also reported 
to OPRA for inclusion in this consolidated data stream. The Exchange 
also must notify OPRA and other market participants that an order has 
been cancelled, and that quotes may have been cancelled as a result of 
a Member purging quotes via their Purge Port. Thus, since market data 
from other exchanges is consumed by the Matching Engine to validate 
quotes and check market conditions, the Exchange believes it is 
reasonable to allocate a small amount of such costs to Purge Ports.
---------------------------------------------------------------------------

    \34\ The term ``NBBO'' means the national best bid or offer as 
calculated by the Exchange based on market information received by 
the Exchange from OPRA. See Exchange Rule 100.
---------------------------------------------------------------------------

    For the reasons set forth above, the Exchange believes it is 
reasonable to allocate a small amount of such costs to Purge Ports 
since market data from other exchanges is consumed at the Exchange's 
Purge Port level to validate purge messages and the necessity to

[[Page 35915]]

cancel a resting quote via a purge message or via some other means.
Data Center
    Data Center costs includes an allocation of the costs the Exchange 
incurs to provide Purge Ports in the third-party data centers where it 
maintains its equipment as well as related costs for market data to 
then enter the Exchange's System. The Exchange does not own the Primary 
Data Center or the Secondary Data Center, but instead, leases space in 
data centers operated by third-parties. The Exchange has allocated a 
percentage of its Data Center cost (2.1%) to Purge Ports because the 
third-party data centers and the Exchange's physical equipment 
contained therein are necessary for providing Purge Ports. In other 
words, for the Exchange to operate in a dedicated physical space with 
direct connectivity by market participants to its trading platform, the 
data centers are a critical component to the provision of Purge Ports. 
If the Exchange did not maintain such a presence, then Purge Ports 
would be of little value to market participants.
Hardware and Software Maintenance and Licenses
    Hardware and Software Licenses includes hardware and software 
licenses used to operate and monitor physical assets necessary to offer 
Purge Ports for each Matching Engine of the Exchange. This hardware 
includes servers, network switches, cables, optics, protocol data 
units, and cabinets, to maintain a state-of-the-art technology 
platform. Without hardware and software licenses, Purge Ports would not 
be able to be offered to market participants because hardware and 
software are necessary to operate the Exchange's Matching Engines, 
which are necessary to enable the purging of quotes. The Exchange also 
routinely works to improve the performance of the hardware and software 
used to operate the Exchange's network and System. The costs associated 
with maintaining and enhancing a state-of-the-art exchange network is a 
significant expense for the Exchange, and thus the Exchange believes 
that it is reasonable and appropriate to allocate a certain percentage 
of its hardware and software expense to help offset those costs of 
providing Purge Port connectivity to its Matching Engines.
Depreciation
    The vast majority of the software the Exchange uses to provide 
Ports has been developed in-house and the cost of such development, 
which takes place over an extended period of time and includes not just 
development work, but also quality assurance and testing to ensure the 
software works as intended, is depreciated over time once the software 
is activated in the production environment. Hardware used to provide 
Purge Ports includes equipment used for testing and monitoring of order 
entry infrastructure and other physical equipment the Exchange 
purchased and is also depreciated over time.
    All hardware and software, which also includes assets used for 
testing and monitoring of order entry infrastructure, were valued at 
cost, depreciated or leased over periods ranging from three to five 
years. Thus, the depreciation cost primarily relates to servers 
necessary to operate the Exchange, some of which is owned by the 
Exchange and some of which is leased by the Exchange in order to allow 
efficient periodic technology refreshes. The Exchange allocated 1.9% of 
all depreciation costs to providing Purge Ports. The Exchange allocated 
depreciation costs for depreciated software necessary to operate the 
Exchange because such software is related to the provision of Purge 
Ports. As with the other allocated costs in the Exchange's updated Cost 
Analysis, the Depreciation cost driver was therefore narrowly tailored 
to depreciation related to Purge Ports.
Allocated Shared Expenses
    Finally, a portion of general shared expenses was allocated to 
overall Purge Port costs as without these general shared costs the 
Exchange would not be able to operate in the manner that it does and 
provide Purge Ports. The costs included in general shared expenses 
include general expenses of the Exchange, including office space and 
office expenses (e.g., occupancy and overhead expenses), utilities, 
recruiting and training, marketing and advertising costs, professional 
fees for legal, tax and accounting services (including external and 
internal audit expenses), and telecommunications costs. The Exchange 
again notes that the cost of paying directors to serve on its Board of 
Directors is included in the calculation of Allocated Shared Expenses, 
and thus a portion of such overall cost amounting to less than 3% of 
the overall cost for directors was allocated to providing Purge Ports.
Approximate Cost for Purge Ports per Month
    Based on projected 2024 data, the total monthly cost allocated to 
Purge Ports of $75,868 was divided by the total number of Matching 
Engines in which Market Makers used Purge Ports for the month of 
December 2023, which was 291, resulting in an approximate cost of $261 
per Matching Engine per month for Purge Port usage (when rounding to 
the nearest dollar). The Exchange notes that the flat fee of $300 per 
month per Matching Engine entitles each Market Maker to two Purge Ports 
per Matching Engine. The majority of Market Makers are connected to all 
twenty-four of the Exchange's Matching Engines and utilize Purge Ports 
on each Matching Engine, except one Market Maker, which only utilizes 
Purge Ports on three Matching Engines.
Cost Analysis--Additional Discussion
    In conducting its Cost Analysis, the Exchange did not allocate any 
of its expenses in full to any core services (including Purge Ports) 
and did not double-count any expenses. Instead, as described above, the 
Exchange allocated applicable cost drivers across its core services and 
used the same Cost Analysis to form the basis of this proposal. For 
instance, in calculating the Human Resources expenses to be allocated 
to Purge Ports based upon the above described methodology, the Exchange 
has a team of employees dedicated to network infrastructure and with 
respect to such employees the Exchange allocated network infrastructure 
personnel with a higher percentage of the cost of such personnel 
(19.6%) given their focus on functions necessary to provide Ports. The 
salaries of those same personnel were allocated only 2.7 to Purge Ports 
and the remaining 97.3% was allocated to connectivity, other port 
services, transaction services, membership services and market data. 
The Exchange did not allocate any other Human Resources expense for 
providing Purge Ports to any other employee group, outside of a smaller 
allocation of 1.2% for Purge Ports, of the cost associated with certain 
specified personnel who work closely with and support network 
infrastructure personnel. This is because a much wider range of 
personnel are involved in functions necessary to offer, monitor and 
maintain Purge Ports but the tasks necessary to do so are not a primary 
or full-time function.
    In total, the Exchange allocated 2.2% of its personnel costs to 
providing Purge Ports. In turn, the Exchange allocated the remaining 
97.8% of its Human Resources expense to membership services, 
transaction services, connectivity services, other port services and 
market data. Thus, again, the Exchange's allocations of cost across 
core services were based on real costs of operating the Exchange and 
were not

[[Page 35916]]

double-counted across the core services or their associated revenue 
streams.
    As another example, the Exchange allocated depreciation expense to 
all core services, including Purge Ports, but in different amounts. The 
Exchange believes it is reasonable to allocate the identified portion 
of such expense because such expense includes the actual cost of the 
computer equipment, such as dedicated servers, computers, laptops, 
monitors, information security appliances and storage, and network 
switching infrastructure equipment, including switches and taps that 
were purchased to operate and support the network. Without this 
equipment, the Exchange would not be able to operate the network and 
provide Purge Port services to its Market Makers. However, the Exchange 
did not allocate all of the depreciation and amortization expense 
toward the cost of providing Purge Port services, but instead allocated 
approximately 1.9% of the Exchange's overall depreciation and 
amortization expense to Purge Ports. The Exchange allocated the 
remaining depreciation and amortization expense (approximately 98.1%) 
toward the cost of providing transaction services, membership services, 
connectivity services, other port services, and market data.
    The Exchange notes that its revenue estimates are based on 
projections across all potential revenue streams and will only be 
realized to the extent such revenue streams actually produce the 
revenue estimated. The Exchange does not yet know whether such 
expectations will be realized. For instance, in order to generate the 
revenue expected from Purge Ports, the Exchange will have to be 
successful in retaining existing Market Makers that wish to maintain 
Purge Ports or in obtaining new Market Makers that will purchase such 
services. Similarly, the Exchange will have to be successful in 
retaining a positive net capture on transaction fees in order to 
realize the anticipated revenue from transaction pricing.
    The Exchange notes that the Cost Analysis is based on the 
Exchange's 2024 fiscal year of operations and projections. It is 
possible, however, that actual costs may be higher or lower. To the 
extent the Exchange sees growth in use of connectivity services it will 
receive additional revenue to offset future cost increases. However, if 
use of port services is static or decreases, the Exchange might not 
realize the revenue that it anticipates or needs in order to cover 
applicable costs. Accordingly, the Exchange is committing to conduct a 
one-year review after implementation of these fees. The Exchange 
expects that it may propose to adjust fees at that time, to increase 
fees in the event that revenues fail to cover costs and a reasonable 
mark-up of such costs. Similarly, the Exchange may propose to decrease 
fees in the event that revenue materially exceeds our current 
projections. In addition, the Exchange will periodically conduct a 
review to inform its decision making on whether a fee change is 
appropriate (e.g., to monitor for costs increasing/decreasing or 
subscribers increasing/decreasing, etc. in ways that suggest the then-
current fees are becoming dislocated from the prior cost-based 
analysis) and would propose to increase fees in the event that revenues 
fail to cover its costs and a reasonable mark-up, or decrease fees in 
the event that revenue or the mark-up materially exceeds our current 
projections. In the event that the Exchange determines to propose a fee 
change, the results of a timely review, including an updated cost 
estimate, will be included in the rule filing proposing the fee change. 
More generally, the Exchange believes that it is appropriate for an 
exchange to refresh and update information about its relevant costs and 
revenues in seeking any future changes to fees, and the Exchange 
commits to do so.
Projected Revenue \35\
---------------------------------------------------------------------------

    \35\ For purposes of calculating projected 2024 revenue for 
Purge Ports, the Exchange used revenues for the most recently 
completed full month.
---------------------------------------------------------------------------

    The proposed fees will allow the Exchange to cover certain costs 
incurred by the Exchange associated with providing and maintaining 
necessary hardware and other network infrastructure as well as network 
monitoring and support services; without such hardware, infrastructure, 
monitoring and support the Exchange would be unable to provide port 
services. Much of the cost relates to monitoring and analysis of data 
and performance of the network via the subscriber's connection(s). The 
above cost, namely those associated with hardware, software, and human 
capital, enable the Exchange to measure network performance with 
nanosecond granularity. These same costs are also associated with time 
and money spent seeking to continuously improve the network 
performance, improving the subscriber's experience, based on monitoring 
and analysis activity. The Exchange routinely works to improve the 
performance of the network's hardware and software. The costs 
associated with maintaining and enhancing a state-of-the-art exchange 
network is a significant expense for the Exchange, and thus the 
Exchange believes that it is reasonable and appropriate to help offset 
those costs by amending fees for Purge Port services. Subscribers, 
particularly those of Purge Ports, expect the Exchange to provide this 
level of support so they continue to receive the performance they 
expect. This differentiates the Exchange from its competitors. As 
detailed above, the Exchange has five primary sources of revenue that 
it can potentially use to fund its operations: transaction fees, fees 
for connectivity services (connections and ports), membership and 
regulatory fees, and market data fees. Accordingly, the Exchange must 
cover its expenses from these five primary sources of revenue.
    The Exchange's Cost Analysis estimates the annual cost to provide 
Purge Port services will equal $910,413. Based on current Purge Port 
services usage, the Exchange would generate annual revenue of 
approximately $1,047,600. The Exchange believes this represents a 
modest profit of 13.1% when compared to the cost of providing Purge 
Port services, which could decrease over time.\36\
---------------------------------------------------------------------------

    \36\ Assuming the U.S. inflation rate continues at its current 
rate, the Exchange believes that the projected profit margins in 
this proposal will decrease; however, the Exchange cannot predict 
with any certainty whether the U.S. inflation rate will continue at 
its current rate or its impact on the Exchange's future profits or 
losses. See, e.g., https://www.usinflationcalculator.com/inflation/current-inflation-rates/ (last visited April 15, 2024).
---------------------------------------------------------------------------

    Based on the above discussion, the Exchange believes that even if 
the Exchange earns the above revenue or incrementally more or less, the 
proposed fees are fair and reasonable because they will not result in 
pricing that deviates from that of other exchanges or a supra-
competitive profit, when comparing the total expense of the Exchange 
associated with providing Purge Port services versus the total 
projected revenue of the Exchange associated with network Purge Port 
services.
The Proposed Fees Are Also Equitable, Reasonable, and Not Unfairly 
Discriminatory
    The Exchange believes that the proposed rule change would promote 
just and equitable principles of trade and remove impediments to and 
perfect the mechanism of a free and open market because offering Market 
Makers optional Purge Port services with a flexible fee structure 
promotes choice, flexibility, and efficiency. The Exchange believes 
Purge Ports enhance Market Makers' ability to manage quotes, which

[[Page 35917]]

would, in turn, improve their risk controls to the benefit of all 
market participants. The Exchange believes that Purge Ports foster 
cooperation and coordination with persons engaged in facilitating 
transactions in securities because designating Purge Ports for purge 
messages may encourage better use of such ports. This may, concurrent 
with the ports that carry quotes and other information necessary for 
market making activities, enable more efficient, as well as fair and 
reasonable, use of Market Makers' resources. The Exchange believes that 
proper risk management, including the ability to efficiently cancel 
multiple quotes quickly when necessary is valuable to all firms, 
including Market Makers that have heightened quoting obligations that 
are not applicable to other market participants.
    Purge Ports do not relieve Market Makers of their quoting 
obligations or firm quote obligations under Regulation NMS Rule 
602.\37\ Specifically, any interest that is executable against a 
Member's or Market Maker's quotes that is received by the Exchange 
prior to the time of the removal of quotes request will automatically 
execute. Market Makers that purge their quotes will not be relieved of 
the obligation to provide continuous two-sided quotes on a daily basis, 
nor will it prohibit the Exchange from taking disciplinary action 
against a Market Maker for failing to meet their continuous quoting 
obligation each trading day.\38\
---------------------------------------------------------------------------

    \37\ See Exchange Rule 604. See also generally Chapter VI of the 
Exchange's Rules.
    \38\ Id.
---------------------------------------------------------------------------

    The Exchange also believes that offering Purge Ports at the 
Matching Engine level promotes risk management across the industry, and 
thereby facilitates investor protection. Some market participants, in 
particular the larger firms, could and do build similar risk 
functionality in their trading systems that permit the flexible 
cancellation of quotes entered on the Exchange at a high rate. Offering 
Matching Engine level protections ensures that such functionality is 
widely available to all firms, including smaller firms that may 
otherwise not be willing to incur the costs and development work 
necessary to support their own customized mass cancel functionality. 
The Exchange also believes that moving to a per Matching Engine fee for 
Purge Ports is reasonable due to the Exchange's architecture that 
provides the Exchange the ability to provide two (2) Purge Ports per 
Matching Engine.
    The Exchange believes that the proposed Purge Port fees are 
equitable because the proposed Purge Ports are completely voluntary as 
they relate solely to optional risk management functionality.
    The Exchange also believes that the proposed amendments to its Fee 
Schedule are not unfairly discriminatory because they will apply 
uniformly to all Market Makers that choose to use the optional Purge 
Ports. Purge Ports are completely voluntary and, as they relate solely 
to optional risk management functionality, no Market Maker is required 
or under any regulatory obligation to utilize them. All Market Makers 
that voluntarily select this service option will be charged the same 
amount for the same services. All Market Makers have the option to 
select any port or connectivity option, and there is no differentiation 
among Market Makers with regard to the fees charged for the services 
offered by the Exchange.

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. Purge Ports are completely 
voluntary and are available to all Market Makers on an equal basis at 
the same cost. While the Exchange believes that Purge Ports provide a 
valuable service, Market Makers can choose to purchase, or not 
purchase, these ports based on their own determination of the value and 
their business needs. No Market Maker is required or under any 
regulatory obligation to utilize Purge Ports. Accordingly, the Exchange 
believes that Purge Ports offer appropriate risk management 
functionality to firms that trade on the Exchange without imposing an 
unnecessary or inappropriate burden on competition.
    The Exchange also does not believe the proposal would cause any 
unnecessary or inappropriate burden on intermarket competition as other 
exchanges are free to introduce their own purge port functionality and 
lower their prices to better compete with the Exchange's offering. The 
Exchange does not believe the proposed rule change would cause any 
unnecessary or inappropriate burden on intramarket competition. 
Particularly, the proposal would apply uniformly to any market 
participant, in that it does not differentiate between Market Makers. 
The proposal would allow any interested Market Makers to purchase Purge 
Port functionality based on their business needs.

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

    The Exchange received one comment letter on the Initial Proposal 
and one comment letter on the Second Proposal, both from the same 
commenter.\39\ These comment letters were submitted not only on these 
proposals, but also the proposals by the Exchange and its affiliates to 
amend fees for 10Gb ULL connectivity and certain other ports. The 
Exchange received one other comment letter on the Second Proposal, 
another on the Third Proposal, and another on the Fourth Proposal from 
a separate commenter.\40\ Overall, the Exchange believes that the 
issues raised by the first commenter are not germane to this proposal 
because they apply primarily to the other fee filings. Also, both 
commenters raised concerns with the current environment surrounding 
exchange non-transaction fee proposals that should be addressed by the 
Commission through rule making, or Congress, more holistically and not 
through an individual exchange fee filings. However, the commenters do 
raise one issue that concerns this proposal whereby it asserts that the 
Exchange's comparison to fees charged by other exchanges for similar 
ports is irrelevant and unpersuasive. The core of the issue raised is 
regarding the cost to connect to one exchange compared to the cost to 
connect to others. A thorough response to this comment would require 
the Exchange to obtain competitively sensitive information about other 
exchanges' architecture and how their members connect. The Exchange is 
not privy to this information. Further, the commenters compare the 
Exchange's proposed rate to other exchanges that offer purge port 
functionality across all matching engines for a single fee, but fails 
to provide the same comparison to other exchanges that charge for purge 
functionality as proposed herein. Nonetheless, the Exchange notes that 
it is relying on a cost-based justification to support the proposed fee 
change, not a comparison of the proposed fees to the fees charged by 
other exchanges for similar purging services. The Exchange does not 
have insight into the technical architecture of other exchanges so it 
is difficult to ascertain the number of purge ports a firm would need 
to

[[Page 35918]]

connect to another exchange's entire market. Therefore, the Exchange is 
limited to comparing its proposed fee to other exchanges' purge port 
fees as listed in their fee schedules.
---------------------------------------------------------------------------

    \39\ See letters from Thomas M. Merritt, Deputy General Counsel, 
Virtu Financial, Inc. (``Virtu''), to Vanessa Countryman, Secretary, 
Commission, dated November 8, 2023 and January 2, 2024.
    \40\ See letters from John C. Pickford, Counsel, Susquehanna 
International Group, LLP (``SIG''), to Vanessa Countryman, 
Secretary, Commission, dated January 4, 2024, March 1, 2024, and 
April 11, 2024.
---------------------------------------------------------------------------

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

    The foregoing rule change has become effective pursuant to Section 
19(b)(3)(A)(ii) of the Act,\41\ and Rule 19b-4(f)(2) \42\ thereunder. 
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.
---------------------------------------------------------------------------

    \41\ 15 U.S.C. 78s(b)(3)(A)(ii).
    \42\ 17 CFR 240.19b-4(f)(2).
---------------------------------------------------------------------------

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-2024-22 on the subject line.

Paper Comments

     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-MIAX-2024-22. 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 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-2024-22 and should be 
submitted on or before May 23, 2024.

    For the Commission, by the Division of Trading and Markets, 
pursuant to delegated authority.\43\
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    \43\ 17 CFR 200.30-3(a)(12).
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Sherry R. Haywood,
Assistant Secretary.
[FR Doc. 2024-09470 Filed 5-1-24; 8:45 am]
BILLING CODE 8011-01-P