Effective July 13, 2026, Cboe Options Exchange (C1) plans to expand trading hours for select equity options by establishing a morning Global Trading Hours (GTH) session and afternoon Curb session, subject to regulatory review.

The opening rotation process for equity options traded during GTH will follow the existing RTH opening process for multi-list options. In general, a class will begin the opening rotation upon receipt of the first round-lot print in the underlying from the primary listing exchange and observation of a two-sided bid/ask in the underlying from the primary exchange following the start of the GTH session (7:30 a.m. ET).

If a firm has existing Default Risk Management rules, those will automatically apply to both the GTH and Curb trading sessions. Alternatively, firms may choose to upload new rules for the GTH and Curb sessions.

The existing Pre-Open/GTH Session exchange default fat-finger limits will apply to the equity options products eligible to trade in GTH.

Trading Permit Holders (TPHs) must be authorized for GTH trading at the OCC and Cboe. Such authorization will allow GTH trading of equity options and Cboe proprietary index options. Thus, TPHs that are already authorized for GTH trading do not need any further authorization to trade equity options during the GTH session.

No additional action is needed to participate in Curb trading.