• Reminder: CME Optimizer Software Version 19 Release, Mandatory Upgrade Required January 22, 2024 - Effective January 16, 2024

      • To
      • Clearing Member Firms; Back Office Managers
      • From
      • CME Clearing
      • #
      • 24-016
      • Notice Date
      • 16 January 2024
      • Effective Date
      • 16 January 2024

    • As a reminder, CME released a new build of the Optimizer software, version 19. Optimizer users must upgrade to the newest build on the production deadline January 22, 2024. Firms who do not upgrade on the production deadline will experience subsequent Optimizer failures. The Optimizer was made available for testing on November 20, 2023 and the production adoption window for this build began on December 11, 2023.

      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.

© 2025 CME Group Inc. All rights reserved.