The market had been on a nine-year run that saw the Dow Jones Industrial Average increase in value tenfold, peaking at 381.17 on September 3, 1929.[7] Shortly before the crash, economist Irving Fisher famously proclaimed, "Stock prices have reached what looks like a permanently high plateau."[8] The optimism and financial gains of the great bull market were shaken on September 18, 1929, when share prices on the New York Stock Exchange (NYSE) abruptly fell.