The document summarizes the collapse of Lehman Brothers investment bank in September 2008. It provides background on Lehman Brothers and explains the key reasons for its bankruptcy, including losses from subprime mortgage loans, a lack of confidence from other banks, and the refusal of potential acquirers like Barclays. The CEO's pride and refusal to sell at a lower price were also factors. The fall of Lehman Brothers and Merrill Lynch's acquisition by Bank of America shocked markets and increased uncertainty about other financial institutions like AIG and Washington Mutual. The events also increased risk perceptions in Indian markets.