After-Hours Electronic
Some contracts trade both electronically and via open outcry on the CME trading floor, but trade electronically only when there is no trading on the floor. For these products, the Trading Day begins with the CME® Globex® session and ends with the close of open outcry trading.  Examples in this group include:

• CME S&P 500® Futures and Options on Futures,
• CME Interest Rate Options on Futures,
• CME Foreign Exchange Options on Futures.

The first Trading Day begins on Sunday, with the opening rotation starting at 17:00 CT and trading continuing on CME Globex until the next morning. Closing times vary by product, with CME Globex trading always ceasing prior to the start of trading on the floor. On Monday through Thursday, the pre-opening cycle takes place during the open outcry session to enable customers to begin entering orders for the next Trading Day.

The CME Equity products have unique schedules Monday through Thursday afternoons to accommodate an earlier transition to the next trading day. These expanded schedules enable customers to respond to key equity earnings news in the late afternoon.