Which 2008 event became the defining symbol of the global financial crisis and intensified the stock-market crash?

The 2008 event that became a defining symbol of the global financial crisis was the bankruptcy of Lehman Brothers.

Lehman Brothers filed for Chapter 11 bankruptcy protection on September 15, 2008. It was the largest bankruptcy filing in U.S. history at that time. The investment bank had accumulated substantial exposure to mortgage-related assets, and the collapse sharply increased fears that other financial institutions could fail.

The bankruptcy intensified stress in credit markets and contributed to a dramatic global stock-market sell-off. Governments and central banks responded with emergency lending, capital injections, guarantees, and other measures. The crisis had already begun before Lehman failed, including the collapse of the U.S. housing bubble and the rescue or failure of other institutions.

A common mistake is calling Lehman the sole cause of the 2008 crash. It was a major catalyst and symbol, but the crisis reflected years of leverage, risky mortgage lending, complex securitization, and weak risk controls. The company’s bankruptcy also helped reveal how interconnected global finance had become.