What was the nickname of the New York stock-market crash day on October 29, 1929?

October 29, 1929, was nicknamed Black Tuesday because U.S. stock markets suffered a massive sell-off that day.

Black Tuesday followed Black Thursday, October 24, and Black Monday, October 28. On October 29, investors traded roughly 16 million shares on the New York Stock Exchange, an enormous volume for the period. The Dow Jones Industrial Average fell about 12%, deepening the collapse that had begun after the market’s September peak.

The crash did not by itself create every condition of the Great Depression. Falling investment, bank failures, reduced consumer demand, international debt problems, and weaknesses in industry also mattered. The crash became the most famous symbol of the Depression because it sharply damaged confidence and wealth.

Black Tuesday is sometimes used loosely for the entire 1929 crash, but it specifically refers to October 29. Black Monday and Black Thursday are separate dates in the same episode.