• Product Modification Summary: Amendments to the Trade Marker at Close (“TMAC”) Eligibility for Certain CME and CBOT Equity Index Futures Contracts - Effective September 11, 2023

      • To
      • Clearing Member Firms; Back Office Managers; Bookkeeping Software Providers; ISVs
      • From
      • CME Clearing
      • #
      • 23-256
      • Notice Date
      • 23 August 2023
      • Effective Date
      • 11 September 2023

    • Amendments to the Trade Marker at Close (“TMAC”) Eligibility for Certain CME and CBOT Equity Index Futures Contracts.

      For the full text of this advisory, please click here.

       

CME Group is the world’s leading derivatives marketplace. The company is comprised of four Designated Contract Markets (DCMs). 
Further information on each exchange's rules and product listings can be found by clicking on the links to CME, CBOT, NYMEX and COMEX.

© 2026 CME Group Inc. All rights reserved.