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Continued from A1...

     The United States subprime mortgage crisis was a multinational financial crisis that occurred between 2007 and 2010 that contributed to the 2007–2008 global financial crisis. It was triggered by a large decline in US home prices after the collapse of a housing bubble, leading to mortgage delinquencies, foreclosures, and the devaluation of housing-related securities. Declines in residential investment preceded the Great Recession and were followed by reductions in household spending and then business investment. Spending reductions were more significant in areas with a combination of high household debt and larger housing price declines.

     The housing bubble preceding the crisis was financed with mortgage-backed securities (MBSes) and collateralized debt obligations (CDOs), which initially offered higher interest rates (i.e. better returns) than government securities, along with attractive risk ratings from rating agencies. While elements of the crisis first became more visible during 2007, several major financial institutions collapsed in September 2008, with significant disruption in the flow of credit to businesses and consumers and the onset of a severe global recession.

     There were many causes of the crisis, with commentators assigning different levels of blame to financial institutions, regulators, credit agencies, government housing policies, and consumers, among others. Two proximate causes were the rise in subprime lending and the increase in housing speculation. The percentage of lower-quality subprime mortgages originated during a given year rose from the historical 8% or lower range to approximately 20% from 2004 to 2006, with much higher ratios in some parts of the U.S. A high percentage of these subprime mortgages, over 90% in 2006 for example, had an interest rate that increased over time. Housing speculation also increased, with the share of mortgage originations to investors (i.e. those owning homes other than primary residences) rising significantly from around 20% in 2000 to around 35% in 2006–2007. Investors, even those with prime credit ratings, were much more likely to default than non-investors when prices fell.^[8][9][10] These changes were part of a broader trend of lowered lending standards and higher-risk mortgage products, which contributed to U.S. households becoming increasingly indebted. The ratio of household debt to disposable personal income rose from 77% in 1990 to 127% by the end of 2007.

     When U.S. home prices declined steeply after peaking in mid-2006, it became more difficult for borrowers to refinance their loans. As adjustable-rate mortgages began to reset at higher interest rates (causing higher monthly payments), mortgage delinquencies soared. Securities backed with mortgages, including subprime mortgages, widely held by financial firms globally, lost most of their value. Global investors also drastically reduced purchases of mortgage-backed debt and other securities as part of a decline in the capacity and willingness of the private financial system to support lending. Concerns about the soundness of U.S. credit and financial markets led to tightening credit around the world and slowing economic growth in the U.S. and Europe.

     The crisis had severe, long-lasting consequences for the U.S. and European economies. The U.S. entered a deep recession, with nearly 9 million jobs lost during 2008 and 2009, roughly 6% of the workforce. The number of jobs did not return to the December 2007 pre-crisis peak until May 2014. U.S. household net worth declined by nearly $13 trillion (20%) from its Q2 2007 pre-crisis peak, recovering by Q4 2012. U.S. housing prices fell nearly 30% on average and the U.S. stock market fell approximately 50% by early 2009, with stocks regaining their December 2007 level during September 2012. One estimate of lost output and income from the crisis comes to "at least 40% of 2007 gross domestic product". Europe also continued to struggle with its own economic crisis, with elevated unemployment and severe banking impairments estimated at €940 billion between 2008 and 2012. As of January 2018, U.S. bailout funds had been fully recovered by the government, when interest on loans is taken into consideration. A total of $626B was invested, loaned, or granted due to various bailout measures, while $390B had been returned to the Treasury. The Treasury had earned another $323B in interest on bailout loans, resulting in an $87B profit.