The Dow Jones Industrial Average closed down 816.92 points, or 1.91%, at 41,860.32 on Wednesday, May 21;
The S&P 500 closed down 95.87 points, or 1.61%, at 5,844.59 on Wednesday, May 21;
The Nasdaq Composite closed down 270.07 points, or 1.41%, at 18,872.64 on Wednesday, May 21.