Nasdaq sets 6 December launch for 23/5 U.S. equity trading
Nasdaq plans a new 21:00–04:00 ET equity session from 6 December, subject to SIP readiness and remaining SEC changes. Testing starts 1 September. New ports, next-day trade dating, 04:00 cancellations and a separate ITCH feed make the change operationally concrete.
Why it matters
Cash equities, listed options and futures will run on different clocks. Trade-date, hedging, funding, corporate-action and T+1 controls therefore need session-aware ownership.
Likely business impact
Inventory affected ports, feeds and downstream trade-date logic before 1 September; use October UAT to set client coverage and overnight escalation before launch.
What to watch
- SIP readiness and remaining SEC changes
- Next-day trade dating and 04:00 order lifecycle
- Liquidity and hedging while Nasdaq options remain closed