Subprime Mortgage Crisis: The subprime mortgage crisis was a major contributing factor to the Great Recession, as the collapse of the U.S. housing bubble and risky subprime mortgage lending practices led to a wave of foreclosures and a credit crunch.
Quantitative Easing: Quantitative easing was a monetary policy tool used by central banks, including the Federal Reserve, to stimulate the economy during the Great Recession by purchasing government bonds and other financial assets to increase the money supply and lower interest rates.
Globalization: The increased interconnectedness of the world's economies, trade, and financial markets played a significant role in the spread and severity of the Great Recession, as economic shocks were rapidly transmitted across national borders.