美股延续跌势，标普500指数下跌1%，纳指跌1.4%，道指跌0.4%。

Core Points - U.S. stock market continues to decline, with the S&P 500 index down by 1%, the Nasdaq down by 1.4%, and the Dow Jones down by 0.4% [1] Summary by Category - Market Performance - S&P 500 index decreased by 1% [1] - Nasdaq index fell by 1.4% [1] - Dow Jones index dropped by 0.4% [1]