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Overview:

Market Open/Close

The below instruments are available at the session hours listed:

MarketsOpenClose

CLOB

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

CLOB

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

Trade Reporting

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

Holidays

OneChicago observes the same holiday calendar as the U.S. Equity Market.

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.