| The 15 worst DJIA declines as a percentage of market value |
| Rank | Date | Point decline | % decline |
| 1 | 10/19/1987 | 508.00 | 22.61% |
| 2 | 10/28/1929 | 38.33 | 12.82% |
| 3 | 10/29/1929 | 30.57 | 11.73% |
| 4 | 11/06/1929 | 25.55 | 9.92% |
| 5 | 12/18/1899 | 5.57 | 8.72% |
| 6 | 08/12/1932 | 5.79 | 8.40% |
| 7 | 03/14/1907 | 6.89 | 8.29% |
| 8 | 10/26/1987 | 156.83 | 8.04% |
| 9 | 07/21/1933 | 7.55 | 7.84% |
| 10 | 10/18/1937 | 10.57 | 7.75% |
| 11 | 02/01/1917 | 6.91 | 7.24% |
| 12 | 10/27/1997 | 554.26 | 7.18% |