[Major U.S. Exchanges Plan to Extend Stock Trading Hours, Pushing U.S. Stocks Toward 24-Hour Trading] Major U.S. exchanges are formulating plans to expand and promote stock trading beyond traditional trading hours. The New York Stock Exchange and Nasdaq already offer pre-market and after-hours trading, but trading activity during these periods is typically low. With the rise of 24-hour cryptocurrency trading platforms, stock trading platforms, and round-the-clock prediction markets like Polymarket and Kalshi, coupled with increasing demand from investors outside the U.S. for continuous liquidity and timely trading, major exchanges are seeking to extend stock trading hours. (Source: Bloomberg)