- (business, economics, finance) The day when the New York Stock Exchange crashed before the Great Depression; Thursday, October 24th, 1929.
black thursday - Investment & Finance Definition
October 25, 1929, when the U.S. stock market crashed and a record volume of 12.9 million shares traded, beating the previous peak of 4 million. Stocks sustained substantial losses. This crash was exceeded by the crash that occurred on the following Monday, October 29, when prices fell again on record volume of 16.4 million shares.