SEC Holds 24-Hour Trading Roundtable on Market Readiness and Resiliency

The Securities and Exchange Commission held its public Roundtable on Preparations for 24-Hour Trading on September 17, putting operational readiness for longer U.S. equity-market hours at the center of the discussion. The event covered preparation for a 24-hour market, operational resiliency, and expected market impacts and next steps.

The SEC’s agenda shows that the first panel focused on exchange and broker-dealer readiness, overnight surveillance, closing-price processes, clearing and settlement changes, investor protection, and expected liquidity conditions. A second panel addressed Regulation SCI considerations, failover and capacity planning, market-data continuity, cybersecurity, staffing, and the shorter maintenance windows created by near-continuous operations.

The final discussion looked at how market participation and capital formation could change as trading expands, as well as the infrastructure needed for future 24x7 activity. Participants listed by the SEC included representatives from brokers, exchanges, market makers, clearing and settlement organizations, and technology providers.

Why it matters

Longer trading hours can give retail and professional traders more opportunities to react to overseas developments and company news, but access alone does not guarantee deep liquidity or tight spreads. The roundtable highlights that surveillance, pricing references, clearing, and outages must work across the extended session before broader availability can be treated as routine.

What to watch next

The SEC said a recording would be available after the event. Traders should watch for any staff follow-up, exchange filings, broker rollout details, and data on overnight liquidity, spreads, and order handling as the discussion moves from readiness to implementation.