On what date did Lehman Brothers file for bankruptcy during the 2008 global financial crash?

Lehman Brothers filed for bankruptcy on September 15, 2008, during the global financial crash. Its filing was the largest bankruptcy in U.S. history at that time and became a defining event of the crisis.

Lehman had built a large business around mortgages and mortgage-related securities. As U.S. house prices fell and mortgage defaults increased, the firm suffered enormous losses and struggled to obtain a buyer or sufficient government-backed support. Its collapse intensified fears about the solvency of banks and financial institutions worldwide.

The bankruptcy did not begin the entire crisis: stress had already appeared in credit markets in 2007, and Bear Stearns had been rescued earlier in 2008. However, Lehman's failure sharply increased panic, freezing many forms of lending and contributing to steep falls in global stock markets.