Trading Hours



Trading Hours

The electronic marketplace is open Monday through Friday.

SSF Markets
O: 08:30 AM CT
C: 03:00 PM CT

SSF Spread Markets
O: 08:30 AM CT
C: 04:00 PM CT

Block and EFP Trade Reporting
O: 07:00 AM CT
C: 04:00 PM CT

Half-day Trading Hours

Markets close early on the following days: Jul 03 2017, Nov 24 2017, Jul 03 2018, Nov 23 2018, July 03 2019, Nov 29 2019.

SSF Markets
O: 08:30 AM CT
C: 12:00 PM CT

SSF Spread Markets
O: 08:30 AM CT
C: 01:00 PM CT

Block and EFP Trade Reporting
O: 07:00 AM CT
C: 01:00 PM CT

User Acceptance Testing

Please contact the Trading Operations Desk for scheduled testing requests.

Connectivity Hours
Excluding scheduled maintenance windows and exchange holidays, User Acceptance Testing environments are available Monday through Friday between:

O: 03:00 AM CT
C: 09:00 PM CT

Exchange Holidays

All OneChicago markets are closed on the US holidays as listed below:

2017 2018 2019
New Year’s Day (OBS) Monday Jan 02 Monday Jan 01 Tuesday Jan 01
Martin Luther King, Jr Day Monday Jan 16 Monday Jan 15 Monday Jan 21
President’s Day Monday Feb 20 Monday Feb 19 Monday Feb 18
Good Friday Friday Apr 14 Friday Mar 30 Friday Apr 19
Memorial Day Monday May 29 Monday May 28 Monday May 27
Independence Day Tuesday Jul 04 Wednesday Jul 04 Thursday Jul 04
Labor Day Monday Sep 04 Monday Sep 03 Monday Sep 02
Thanksgiving Day Thursday Nov 23 Thursday Nov 22 Thursday Nov 28
Christmas Monday Dec 25 Tuesday Dec 25 Wednesday Dec 25