• REMINDER: Mutual Offset System and Outbound MOS FIXML API Launches on FEC+ on March 14, 2011

      • To
      • Clearing Member Firms, Back Office Managers
      • From
      • CME Clearing
      • #
      • 11-76
      • Notice Date
      • 25 February 2011
      • Effective Date
      • 14 March 2011

    • Please be informed that effective at the start of business Monday, March 14, 2011, the legacy 3270 (MVSA) Mutual Offset System (MOS) application will be decommissioned.  Subsequently, “MOS Trades” will now be handled as “Cross-Exchange” allocations within Front-End Clearing Plus (FEC+).  In conjunction with this change, the current MOS FIXML outbound-only API will be replaced with the new Allocation FIXML outbound-only API.  A fully functional Allocation API for both inbound and outbound allocation messages will be available shortly thereafter in the second quarter of 2011.

      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.