Why Did the Stock Market Crash of 1929 Happen?

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World War I (1914-1918) brought about inflation and a sharp postwar recession (economic slowdown). Although the banks had bought large quantities of U.S. government bonds during the war, they also lent large amounts of money to individuals engaged in stock market speculation. By investing in bonds, banks helped finance government expenditures during the war and the attendant expansion of American productive resources in the decade following World War I. By lending money to speculators, they became a major factor in the climb of stock prices and the wave of speculation that resulted in the crash of 1929.

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