The Dow Jones Industrial Average opened 296.36 points higher, or 0.57%, at 51,917.84 on Thursday, October 15. The Nasdaq Composite Index opened 321.68 points lower, or 1.21%, at 26,371.19 on Thursday, October 15. The S&P 500 Index opened 34.03 points lower, or 0.44%, at 7,684.91 on Thursday, October 15.