SEC to hold roundtable on 24-hour stock trading

The SEC will hold a public roundtable on Sept. 17 in Washington, D.C., to examine 24-hour equity trading, including operational readiness, rules and market resiliency for overnight sessions.

The U.S. Securities and Exchange Commission will convene a daylong public roundtable on Sept. 17 at its Washington, D.C., headquarters to study a potential shift to 24-hour trading in U.S. stocks and the safeguards needed for overnight sessions.
The regulator plans to focus on operational readiness, order handling, market surveillance, clearing and risk management, and how to keep markets orderly and systems resilient during after-hours trading.
“With the expansion to overnight trading, I’m excited at the prospect of U.S. equity markets aligning with those markets that already trade continuously,” SEC Chair Paul Atkins noted on Thursday.
The event comes as more exchanges consider near-24-hour equity trading. The London Stock Exchange plans to launch a night-time venue in early 2027.
In the U.S., Nasdaq reported in March that it had begun talks with regulators to offer 24-hour trading five days a week on its stock market, aiming for a launch in the second half of 2026, subject to regulatory approval and alignment.
According to the agency, discussions will address how liquidity could be distributed between daytime and overnight sessions and the implications for spreads, volatility and price discovery. The SEC also intends to review data and reporting needs to monitor market quality across a 24-hour schedule, along with resiliency standards to limit outages during extended hours.
Further details on participants and the full agenda are slated for release closer to the event.
