The New York Stock Exchange suffered its 1929 crash's most famous “Black Tuesday” collapse on October 29, 1929.
The day followed “Black Thursday” on October 24 and “Black Monday” on October 28. On Black Tuesday, frantic selling overwhelmed the market, with roughly 16 million shares changing hands, a record at the time. Prices fell sharply across many widely held companies.
The crash did not single-handedly cause the Great Depression. It exposed weaknesses including speculative buying, purchases made on margin, unequal income distribution, and fragile banks. The wider economic downturn deepened through the early 1930s, while the stock market continued falling until 1932.
A common mix-up is treating October 24 as the only start date. That Thursday was the first dramatic panic, but October 29 became the best-known symbol of the crash because of its enormous trading volume and severe selling pressure.