The Dow Jones industrial average plunged 513 points, or 4.3 percent, to 11,384 on Thursday.

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Here's a look at the Dow's 10 worst days since 1899:

By percent decline:

— Oct. 19, 1987: 22.6 percent, or 508 points

— Oct. 28, 1929: 12.8 percent, or 38 points

— Oct. 29, 1929: 11.7 percent, or 31 points

— Nov. 6, 1929: 9.9 percent, or 26 points

— Dec. 18, 1899: 8.7 percent, or 6 points

— Aug. 12, 1932: 8.4 percent, or 6 points

— March 14, 1907: 8.3 percent, or 7 points

— Oct. 26, 1987: 8 percent, or 157 points

— Oct. 15, 2008: 7.9 percent, or 733 points

— July 21, 1933: 7.8 percent, or 8 points

By points:

— Sept. 29, 2008: 778 points, or 7 percent

— Oct. 15, 2008: 733 points, or 7.9 percent

— Sept. 17, 2001: 685 points, or 7.1 percent

— Dec. 1, 2008: 680 points, or 7.7 percent

— Oct. 9, 2008: 679 points, or 7.3 percent

— April 14, 2000: 618 points, or 5.7 percent

— Oct. 27, 1997: 554 points, or 7.2 percent

— Oct. 22, 2008: 514 points, or 5.7 percent

— Aug. 4, 2011: 513 points, or 4.3 percent

— Aug. 31, 1998: 513 points, or 6.4 percent