The New York Stock Exchange experienced the 1929 crash’s largest trading day, known as Black Tuesday, on October 29, 1929.
The session followed Black Thursday on October 24 and Black Monday on October 28. Panic selling intensified as investors tried to escape falling prices, while margin calls forced many leveraged holders to sell.
Black Tuesday was not the only damaging day of the crash, but it became its best-known date because trading volume reached a then-record level and prices fell sharply. The Dow Jones Industrial Average lost about 12 percent that day.
The crash unfolded during a broader economic downturn and was followed by the Great Depression. It is sometimes mistakenly treated as a single-day event; in reality, the market decline extended from 1929 into the early 1930s.