What was the first major panic-selling day of the Wall Street Crash of 1929 called?

The first major panic-selling day of the Wall Street Crash of 1929 was called Black Thursday.

Black Thursday occurred on October 24, 1929, when unusually heavy selling struck the New York Stock Exchange. The Dow Jones Industrial Average opened sharply lower, and trading volume reached a record for the time. Prices stabilized later that day after a group of prominent bankers bought large blocks of blue-chip shares.

That intervention temporarily calmed the market, but it did not end the underlying crisis. Selling resumed the following week, producing Black Monday on October 28 and Black Tuesday on October 29. The Dow fell more dramatically on those later sessions, and the crash continued into November.

The crash followed years of rapid speculation, widespread margin buying, and optimism about rising share prices. Black Thursday is sometimes confused with Black Tuesday because October 29 is often treated as the crash’s most famous single day, but the initial major panic began on October 24.