Which 1929 trading day preceded Black Tuesday and was called Black Thursday?

The 1929 trading day called Black Thursday was October 24, 1929.

Black Thursday was the first major panic day of the Wall Street Crash of 1929. Heavy selling struck the New York Stock Exchange, and the Dow Jones Industrial Average fell sharply. Leading bankers met afterward and announced a pool intended to support prices, temporarily calming the market.

That relief did not last. Selling intensified again on October 28, often called Black Monday, and on October 29, known as Black Tuesday. The sequence helped destroy confidence after years of rising share prices, widespread speculation, and purchases made with borrowed money.

Black Thursday is sometimes confused with Black Tuesday because both were pivotal days in the same crash. October 24 came first, while October 29 produced the famous largest one-day decline associated with the episode. The crash was followed by a prolonged bear market and formed part of the broader economic disaster later called the Great Depression.