The Dow Jones Industrial Average closed down 630.56 points, or 1.21%, at 51,462.55 on Wednesday, September 16. The S&P 500 closed down 33.51 points, or 0.44%, at 7,552.22 on Wednesday, September 16. The Nasdaq Composite closed down 3.15 points, or 0.01%, at 25,978.42 on Wednesday, September 16.