Which 1929 crash day is remembered as Black Tuesday on the New York Stock Exchange?

Black Tuesday on the New York Stock Exchange occurred on October 29, 1929.

On that day, about 16 million shares changed hands, setting a trading-volume record that stood for decades. The Dow Jones Industrial Average fell nearly 12%, following a 13% decline on Black Monday, October 28. The consecutive collapses destroyed confidence in the late-1920s stock boom.

Black Tuesday did not single-handedly cause the Great Depression. The crash was one part of a wider economic breakdown involving falling production, bank failures, debt, unemployment, and reduced consumer spending. The Dow continued to decline after October 29 and reached its low in July 1932.

The phrase is also sometimes used loosely for the entire 1929 Wall Street crash. Black Thursday, October 24, was the first major panic day, while Black Monday and Black Tuesday were the sharpest consecutive losses in the immediate collapse.