Biggest 1-day drops for the Dow Jones industrial average

Another steep sell-off in U.S. stocks sent the Dow Jones industrial average down more than 1,000 points Thursday for the second time in four days.

The Dow's plunge was the second-biggest ever in terms of points, while on a percentage basis, Monday's drop was the largest since August 2011, according to S&P Dow Jones Indices.

The latest drop in the Dow places the 30-company average into a "correction," what Wall Street calls a drop of 10 percent or more from an index's recent peak. It's the first correction in almost two years. The Dow's last peak was January 26.

The Dow's steepest one-day percentage drop came on "Black Monday" on October 19, 1987, when it fell 22.6 percent.

Here are the 10 largest point declines:

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Source: S&P Dow Jones Indices, FactSet