The document discusses the American financial crisis of 2007-2008. It provides background on the subprime mortgage crisis in the United States, which began with rising mortgage defaults in 2007 and led to a global financial crisis. Risky subprime loans were packaged and sold as complex financial derivatives. This caused systemic banking crises as losses mounted. The crisis spread from the housing market to the broader economy, shaking global financial stability. Key factors that contributed to the crisis included reckless lending practices, a culture of greed, cheap credit availability, and the bundling of risky subprime assets into complex securities.