The 1929 Wall Street crash's most famous sell-off, known as Black Tuesday, occurred on October 29, 1929.
On that day, investors traded millions of shares amid panic, and the Dow Jones Industrial Average fell about 12%. Black Tuesday followed Black Thursday on October 24 and Black Monday on October 28, creating a sequence of dramatic declines rather than a single isolated event.
The crash followed years of speculative buying, widespread use of borrowed money, and rapidly rising share prices during the 1920s. Its economic effects deepened during the Great Depression, although historians generally distinguish the market crash from the broader causes and course of the depression.
A common mix-up is treating October 24 as the only date associated with the crash. October 24 marked the first major panic day, while October 29 became the best-known climax. The New York Stock Exchange itself did not close permanently; trading continued under intense pressure.