What was the 29 October 1929 trading day of the Wall Street Crash commonly called?

The 29 October 1929 trading day of the Wall Street Crash was commonly called Black Tuesday.

Black Tuesday followed Black Thursday, the name often given to 24 October, and Black Monday, 28 October. On 29 October, investors traded roughly 16 million shares on the New York Stock Exchange, a record at the time. Prices fell sharply as panic selling intensified, helping make the day one of the most famous episodes in financial history.

The crash did not cause the Great Depression by itself. It was part of a broader economic breakdown that also involved bank failures, falling production, deflation, reduced international trade, and high unemployment. The market had already begun declining after reaching a peak in September 1929, so Black Tuesday marked an acceleration of an existing collapse rather than its exact beginning.

A common mix-up is confusing Black Tuesday with Black Thursday. Black Thursday came first, while Black Tuesday was the later and more dramatic session that became the crash’s best-known date.