Effective on December 05, 2025, and pending all relevant CFTC regulatory review periods, Chicago Mercantile Exchange Inc. (“CME” or “Clearing House”), in its capacities as both a derivatives clearing organization (“DCO”) (“Clearing House” or “CME Clearing”) and designated contract market (“DCM”), The Board of Trade of the City of Chicago, Inc. (“CBOT”), New York Mercantile Exchange, Inc. (“NYMEX”) and Commodity Exchange, Inc. (“COMEX”), in their capacities as DCMs, (each an “Exchange” and collectively, the “Exchanges”) will amend CME, CBOT, NYMEX/COMEX Chapter 9 Rules (“Clearing Members”) (collectively, “Rule Amendments”) in connection with the clearing of Base products during Supplemental Trading Hours (as defined in Exhibit 1 below).

The Exchanges are amending Chapter 9 of the Exchanges’ Rules to include new Rule 916. (“Supplemental Trading Hours”) to specify additional requirements for Base Clearing Members approved to clear Base products, including Event Contract Swaps and cryptocurrency futures and options, during Supplemental Trading Hours (e.g., hours on Saturday). The Exchanges are also amending Rule 982. to clarify that a Base Clearing Member that clears Base products during Supplemental Trading Hours must have written risk management policies and procedures that also include the ability to perform basic risk and operational functions during Supplemental Trading Hours.

The Rule Amendments may be found in Exhibit 1 below with additions underscored.

If you are interested in being approved as a Base Clearing Member to clear transactions during Supplemental Trading Hours, including with regards to the clearing of Event Contract Swaps, or have any questions, please contact Clearing Risk Management: clearingmembership@cmegroup.com or +1(312)-648-3888

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