• Product Modification Summary Reminder: Amendments to NYMEX/COMEX Rules to Eliminate Contrary Instructions and Amend At-the-Money Instructions for Certain NYMEX and COMEX Energy and Metals Option Contracts

      • To
      • Clearing Member Firms; Back Office Managers
      • From
      • CME Clearing
      • #
      • 17-472
      • Notice Date
      • 05 December 2017
      • Effective Date
      • 02 January 2018

    • Reminder: Amendments to NYMEX/COMEX Rules to Eliminate Contrary Exercise Instructions and Amend At-the-Money Instructions for Certain NYMEX and COMEX Energy and Metals Option 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.

© 2025 CME Group Inc. All rights reserved.