The Wall Street Crash of 1929 marked the beginning of the Great Depression. Speculation and overproduction led to a bubble in stock prices throughout the late 1920s. When prices reached unsustainable highs and profits began to fall, widespread panic set in as investors started selling their shares. On October 29, 1929, known as Black Tuesday, share prices collapsed as over 16 million shares were sold in a single day with no buyers found. The crash wiped out millions of investors and led to widespread unemployment that reached over 12 million by 1933. Small businesses closed, banks failed, and people had less money to spend, deepening the economic crisis.