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2026-11-03 15:38:26
[Nasdaq to Launch "23/5" Trading System on December 6, a Major Change to Core Trading Framework After Over Forty Years] (1) Since its establishment in 1971, Nasdaq's regular trading hours for US stocks have long been from 9:30 to 16:00 Eastern Time; although pre-market and after-hours trading have been open for many years, the core trading framework has remained unchanged for over forty years. (2) This December, this pattern will undergo a major change: Nasdaq will officially launch the "23/5" trading system on December 6. (3) Under the new system, only a one-hour market closure window will be retained each day, with the remaining 23 hours of continuous trading.
