The Dow Jones Industrial Average opened down 197.40 points, or 0.38%, at 52,355.57 on Friday, July 17. The S&P 500 opened down 89.23 points, or 1.18%, at 7,444.54 on Friday, July 17. The Nasdaq Composite opened down 621.17 points, or 2.40%, at 25,260.77 on Friday, July 17.