On what date did the 1929 U.S. stock-market crash reach its “Black Tuesday” climax?

The 1929 U.S. stock-market crash reached its “Black Tuesday” climax on October 29, 1929.

Black Tuesday followed Black Thursday on October 24 and Black Monday on October 28. Heavy selling overwhelmed the New York Stock Exchange, and about 16 million shares changed hands, a record at the time. The Dow Jones Industrial Average fell roughly 12 percent that day.

The crash did not single-handedly cause the Great Depression. It intensified an already weakening economy, while bank failures, falling investment, reduced consumer demand, and deflation deepened the downturn. The Dow continued falling after October 1929 and did not reach its low until July 1932.

A common mix-up is treating Black Tuesday as the only day of the crash. It was the most famous climax, but the market’s decline unfolded across several days and reflected broader financial weaknesses.