The Dow Jones Industrial Average falls nearly 13% as the sell-off intensifies.

On 28 October 1929, the New York Stock Exchange (NYSE) experienced “Black Monday,” one of the most devastating trading days in American financial history, as the Wall Street Crash of 1929 intensified. The Dow Jones Industrial Average (DJIA) plunged approximately 12.8%, reflecting widespread panic selling and a dramatic collapse in investor confidence. Following the turmoil of Black Thursday on 24 October, investors continued selling stocks in enormous volumes as fears of further market declines spread throughout Wall Street. The sharp decline erased billions of dollars in market value, highlighting the risks associated with excessive stock speculation, widespread margin borrowing, and rapidly inflated share prices during the economic boom of the 1920s. Black Monday marked a critical turning point in the financial crisis and demonstrated the vulnerability of the American stock market to sudden shifts in investor confidence. The significance of Black Monday extended beyond its historic market decline, as it accelerated the financial collapse that became a defining event of the Great Depression era. The following day, 29 October 1929, known as Black Tuesday, brought another wave of intense selling, with approximately 16.4 million shares traded and the Dow Jones Industrial Average falling nearly 12% further. Together, these events contributed to a prolonged loss of investor confidence and severe financial instability that affected businesses, banks, and households across the United States and internationally. The crash eventually helped inspire major financial reforms, including the Securities Act of 1933, the Securities Exchange Act of 1934, and the establishment of the Securities and Exchange Commission (SEC). Black Monday remains a historic reminder of the importance of responsible investing, effective market regulation, and financial stability in supporting long-term economic growth.