Effective on March 3, 2026, and pending all relevant CFTC regulatory review periods, Chicago Mercantile Exchange Inc. (“CME” or “Clearing House”), in its capacities as a derivatives clearing organization, will amend CME Rule 8G831 (“Commingling of Eligible Futures, Option on Futures, And Swaps Positions”) (collectively, “Rule Amendments”).

CME is certifying revisions to the CME Rulebook to expand the IRS portfolio margining program to include certain positions cleared by Base and IRS Clearing Member affiliates. Specifically, The Rule Amendments provide that an IRS Clearing Member may commingle their eligible proprietary futures and options positions (i.e., “Base Guaranty Fund Products” under CME Rule 8G831) cleared by an affiliated Base Clearing Member with their proprietary IRS positions in the IRS Clearing Member’s proprietary account, without requiring the IRS Clearing Member to become a Base Clearing Member.

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