Page tree

Versions Compared


  • This line was added.
  • This line was removed.
  • Formatting was changed.


Table of Contents

Market Open/Close

The below instruments are available at the session hours listed:



  • Outright SSF
08:30 AM CT03:00 PM CT


  • SSF Calendar Spread
  • STARS™
08:30 AM CT04:00 PM CT

Trade Reporting

  • SSF Block
  • SSF Calendar SpreadSSF EFP
  • STARS™
07:00 AM CT04:00 PM CT

Half-Day Trading Hours

OneChicago does not observe any half-day trading sessions.

User Acceptance Testing

Excluding scheduled maintenance windows and exchange holidays, User Acceptance Testing environments are available Monday through Friday from 05:00 AM CT - 10:00 PM CT.