This Sunday, April 5 (trade date Monday, April 6), as an operational step toward potentially supporting negative pricing and strikes, the MDP 3 Security Definition (tag 35-MsgType=d) for these Energy outright futures and options on CME Globex will be flagged as eligible to trade at negative prices. The options on futures will also be flagged as negative strike price eligible.
Trading at negative prices for these outright markets will not be supported at this time. Negative strike prices will not be listed.
Negative order prices will be rejected with Execution Report (tag 35-MsgType=8) message:
Any changes will be published in future CME Globex Notices.
Negative trade price instruments, and negative strike price eligible instruments, are identified in the MDP 3.0 Security Definition (tag 35-MsgType=d), in repeating group tag 871-InstAttribType: