Large U.S. exchanges are developing plans to extend stock trading beyond traditional market hours, potentially bringing round-the-clock U.S. equity trading closer. The New York Stock Exchange and Nasdaq already provide premarket and after-hours sessions, although trading activity is generally lower. Bloomberg attributed the push to the growth of 24-hour cryptocurrency and stock-trading platforms, prediction markets such as Polymarket and Kalshi, and rising demand from investors outside the United States for continuous liquidity and timely execution.