On what date did the 1929 Wall Street Crash's biggest U.S. share-selling day occur?

The 1929 Wall Street Crash's biggest U.S. share-selling day occurred on October 29, 1929. The date became known as Black Tuesday because panic selling overwhelmed the New York Stock Exchange.

Investors traded millions of shares as confidence collapsed after weeks of falling prices. The crash followed a period of heavy borrowing to buy stocks, rapidly rising share prices, and widespread belief that the boom would continue indefinitely.

Black Tuesday was not the only catastrophic day. Black Thursday, October 24, brought the first major panic, while further selling occurred on October 28 and October 29. The crash did not by itself cause the entire Great Depression, but it severely damaged confidence and helped deepen the economic downturn.

A common mix-up is treating Black Tuesday as the start of the crash. It was instead the most dramatic early climax of the 1929 collapse.