美股持续回落，三大指数全线转跌

Core Viewpoint - The U.S. stock market continues to decline, with all three major indices turning negative after a period of gains, including the Nasdaq which briefly rose over 2.5% [1] Group 1 - The U.S. stock market is experiencing a downturn, with all major indices showing a downward trend [1] - The Nasdaq index had a momentary increase of more than 2.5% before reversing direction [1]