• CME Reference Data Notice: June 15, 2023

      • To
      • Referencial Data Customers
      • From
      • Global Market Solutions & Services (GMSS)
      • #
      • 20230615
      • Notice Date
      • 15 June 2023

    • New CME Reference Data API Enhancements – EBS Size Priority Matching

      Effective Sunday, August 13 (trade date Monday, August 14), CME Reference Data API will be enhanced to support EBS Size Priority Matching. EBS Market on CME Globex will offer a new match algorithm, Size Priority Matching, which prioritizes Large Order Size (LOS) orders to be matched before smaller orders.

      Additional details on impacted products, timelines and new attribute value availability can be found in the EBS Size Priority Matching Client Impact Assessment.

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.