Electronic trading on the CME Globex® platform is available virtually around the clock, from Sunday evening through late Friday afternoon. Trading takes place during five daily CME Globex sessions, during which a customer may enter, view, modify or cancel electronic orders.

During each CME Globex session, all contracts transition through a variety of pre-defined states, although the timing of these states and the transition between them vary by product, according to contract specifications. During each of these states certain trading functionality is allowed or disallowed, as detailed in the CME Globex Reference Guide.

For CME Globex products, the start of the CME Globex session, which usually occurs in the afternoon or evening, generally marks the beginning of the next Trading Day. (For example, orders entered during Sunday's evening session are dated for and cleared on Monday). If the CME Globex and open outcry sessions overlap for a given product, the Trading Day includes both the CME Globex session and the trading floor open outcry session (i.e., Regular Trading Hours (RTH)).

Products that trade on CME Globex are classified into three categories based on their hours of availability:

• Side-by-Side contracts trade on CME Globex and, for a portion of the day, simultaneously via open outcry on the trading floor.
• Electronic-Only contracts trade only on CME Globex.
• After-Hours Electronic contracts trade electronically on CME Globex only after the product stops trading via open outcry on the trading floor (i.e., Extended Trading Hours (ETH) only).