道琼斯指数7月17日（周四）开盘下跌34.51点，跌幅0.08%，报44220.27点；标普500指数7月17日（周四）开盘上涨1.85点，涨幅0.03%，报6265.54点；纳斯达克综合指数7月17日（周四）开盘上涨28.99点，涨幅0.14%，报20759.48点。

Market Performance - The Dow Jones Industrial Average opened at 44,220.27 points, down by 34.51 points, a decrease of 0.08% on July 17 [1] - The S&P 500 opened at 6,265.54 points, up by 1.85 points, an increase of 0.03% on July 17 [1] - The Nasdaq Composite opened at 20,759.48 points, up by 28.99 points, an increase of 0.14% on July 17 [1]