Nasdaq(US:NDAQ) Di Yi Cai Jing Zi Xun·2025-12-16 00:50Core Viewpoint - Nasdaq plans to submit a proposal to the SEC for nearly round-the-clock stock trading, extending trading hours from 16 hours to 23 hours during the five trading days of the week [1] Group 1: Trading Hours Structure - Currently, Nasdaq operates three trading sessions on weekdays: pre-market from 4:00 AM to 9:30 AM, regular trading from 9:30 AM to 4:00 PM, and after-hours from 4:00 PM to 8:00 PM [1] - The proposed "23/5" trading model will feature two trading sessions: a daytime session from 4:00 AM to 8:00 PM, followed by an hour for maintenance and clearing, and a nighttime session from 9:00 PM to 4:00 AM [1] Group 2: Trading Session Details - The daytime session will continue to include pre-market, regular, and after-hours trading, maintaining the opening bell at 9:30 AM and closing bell at 4:00 PM [1] - In the nighttime session, trades executed between 9:00 PM and midnight will be counted towards the next day's trading [1] - The trading week will commence on Sunday at 9:00 PM and conclude on Friday at 8:00 PM after the daytime trading session [1]