What was the 1929 U.S. stock-market collapse commonly called?

The 1929 U.S. stock-market collapse was commonly called the Wall Street Crash.

The crash began in October 1929 after years of speculation and rising share prices. Important dates included Black Thursday on 24 October, Black Monday on 28 October, and Black Tuesday on 29 October, when selling intensified on the New York Stock Exchange.

The decline did not single-handedly cause the Great Depression, but it damaged confidence, reduced wealth, and contributed to a wider contraction. Bank failures, falling investment, reduced consumer spending, and international economic weaknesses deepened the crisis during the early 1930s.

A common mistake is to treat the crash and the Great Depression as identical terms. The crash refers primarily to the collapse in share prices; the depression was the much broader economic crisis that followed.