† Denotes update to the article

†The previously announced UDS Lifecycle Modification, launching this weekend, has been updated so the Last Trade Datetime (LTD) will occur at 2:01 a.m. Central Time (CT), instead of 2:00 a.m. CT.

To accommodate the extension of 24/7 trading schedules to futures and options markets, effective this Sunday, May 24, the lifecycles for all User-Defined Spreads (UDS) on CME Globex will be modified as follows:

• All UDS on CME Globex following the Weekly with Extension and Daily with Extension lifecycles will be created with a Last Trade Datetime (LTD) of Saturday at †2:01 a.m. CT.

  • Currently, these UDS use the close on the nearest Friday as the LTD.

• All expiring UDS on CME Globex will be removed on Saturday during the Extended Maintenance Window on Saturdays at †2:01 a.m. CT.

  • Currently these spreads are removed after the close on Friday night.

With this change, clients will be able to trade UDS created during the week until Saturday morning instead of end of day Friday, for markets that support 24/7 trading schedules.

Please Note: The UDS LTD cannot exceed the LTD of any of the legs. When the LTD of any leg occurs before the LTD of the UDS, the UDS' LTD will be set equal to the LTD of the nearest leg.

The LTD is captured in the MDP 3.0 Security Definition message in repeating group 864, 865=7 and 1145=LTD.

These changes are currently available for customer testing in New Release. CME Group strongly recommends clients test this new LTD and UDS elimination timings to ensure no impacts.