The document summarizes the subprime mortgage crisis and its global impacts. It began with loose lending practices in the US that led to a housing bubble. When housing prices declined and borrowers defaulted, it sparked a financial crisis as risky loans were bundled into securities that spread the risks throughout the global financial system. Major banks and financial institutions collapsed. Credit tightened globally and stock markets plunged significantly. The crisis also impacted economies worldwide through tightening credit, falling markets, and reduced trade and business activity. While government interventions helped stabilize markets, full recovery will take time as the financial systems remain fragile.