Stock prices began to decline in September and early October 1929, and on October 18 a big drop in stock prices began. Panic soon set in, and on October 24, Black Thursday, a record 12,894,650 shares were traded. Investment companies and leading bankers attempted to stabilize the market by buying up great blocks of stock, producing a moderate rally on Friday.
On Monday, however, the storm broke anew, and the market went into free fall. Black Monday was followed by Black Tuesday—October 29, 1929—during which stock prices collapsed completely and 16,410,030 shares were traded on the New York Stock Exchange in a single day. Billions of dollars were lost, wiping out thousands of investors, and stock tickers ran hours behind because the machinery could not handle the tremendous volume of trading.
1929 Stock Market Crash and the Great Depression
After October 29, 1929, stock prices had nowhere to go but up, so there was considerable recovery during succeeding weeks. Overall, however, prices continued to drop as the United States slumped into the Great Depression, and by 1932 stocks were worth only about 20 percent of their value in the summer of 1929.
The stock market crash of 1929 was not the sole cause of the Great Depression, but it did accelerate a global economic collapse. Stock prices continued to drop, and in 1932 the Dow Jones Industrial Average—a widely used benchmark for blue-chip stocks in the United States—closed at 41.22, its lowest value of the 20th century, 89 percent below its peak.