道琼斯指数7月31日（周四）收盘下跌330.30点，跌幅0.74%，报44130.98点；标普500指数7月31日（周四）收盘下跌23.51点，跌幅0.37%，报6339.39点；纳斯达克综合指数7月31日（周四）收盘下跌7.23点，跌幅0.03%，报21122.45点。

Core Points - The Dow Jones Industrial Average closed down 330.30 points, a decrease of 0.74%, ending at 44,130.98 points on July 31 [1] - The S&P 500 index closed down 23.51 points, a decrease of 0.37%, ending at 6,339.39 points on July 31 [1] - The Nasdaq Composite index closed down 7.23 points, a decrease of 0.03%, ending at 21,122.45 points on July 31 [1]