23×5 Testing Opportunities and Go-Live Readiness – Cboe EDGX, Cboe One, and MEMX
Overview CTA/UTP, NYSE Arca, Cboe EDGX, MEMX, and 24X have confirmed readiness to support 23×5 trading hours. Beginning December 6, 2026 (for the December 7, 2026, trading day), these venues will introduce a new Overnight Trading Session, extending the U.S. equity trading week to approximately 23 hours per day, five days per week. The CTA/UTP … More