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

Black Tuesday, the climactic session of the 1929 U.S. stock-market crash, occurred on October 29, 1929.

On that day, investors sold about 16 million shares on the New York Stock Exchange, an enormous volume for the period. The Dow Jones Industrial Average fell sharply, following major declines on Black Thursday, October 24, and Black Monday, October 28. The selling reflected weakening confidence after years of speculation, margin borrowing, and rising share prices.

The crash did not by itself create the entire Great Depression, but it became its most famous financial symbol. Bank failures, falling production, reduced trade, and unemployment deepened the economic crisis during the early 1930s. A common mix-up is calling October 24 Black Tuesday; that earlier date is Black Thursday. Another nearby milestone is September 3, 1929, when the Dow reached its pre-crash peak.