Black Tuesday refers to October 29, 1929, when the stock market crashed dramatically, marking the beginning of the Great Depression. On this day, panic selling led to a loss of billions of dollars in stock value, causing widespread financial devastation. The crash was fueled by speculation and overvaluation of stocks, which had been rising for years. As investors lost confidence, they rushed to sell their shares, resulting in a catastrophic drop in prices. This event not only affected the economy but also had lasting social impacts, leading to unemployment and hardship for millions of Americans.