From 16 November, eligible multi-listed equity options will have a 1:00–1:15pm ET curb session on early-closing days. Designated ETF and ETN options follow a different schedule.
Cboe’s options rule change introduces GTH Only and GTH-and-RTH-only instructions, earlier queuing and session-specific quoting obligations, helping firms prevent orders from unintentionally rolling into the Curb session.