The Great Depression began with the Wall Street stock market crash of October 1929, when the Dow Jones Industrial Average fell 25% in two days. By 1933, U.S. GDP had contracted by approximately 30%, unemployment reached 25%, and nearly half of American banks had failed. The crisis spread globally through trade and financial linkages, affecting economies across Europe and Latin America. Industrial production, international trade, and commodity prices all declined sharply. Recovery measures included the New Deal programs enacted under President Franklin Roosevelt beginning in 1933.