美股延续跌势，标普500指数下跌0.7%，纳斯达克指数下跌0.4%，道指下跌0.9%。

Group 1 - The U.S. stock market continues its downward trend, with the S&P 500 index falling by 0.7% [1] - The Nasdaq index decreased by 0.4% [1] - The Dow Jones Industrial Average dropped by 0.9% [1]