Panic on Wall Street, 24 October 1929. On October 16, 1929, Yale economist Irving Fisher wrote in the New York Times that “Stock prices have reached what looks like a permanently high plateau.” Eight days later, on October 24, 1929, the stock market began a four-day crash on what became known as Black Thursday. This crash cost investors more than World War I and was one of the catalysts for the Great Depression. Irving Fisher’s declaration went down as the worst stock market prediction of all time.
