美国股市持续下跌，道琼斯指数跌幅扩大至2.00%，标普500指数现跌1.23%，纳斯达克综合指数跌1.34%。

Group 1 - The US stock market continues to decline, with the Dow Jones Industrial Average falling by 2.00% [1] - The S&P 500 index has decreased by 1.23% [1] - The Nasdaq Composite index has dropped by 1.34% [1]