page_title: Subprime mortgage crisis
section_title: Background and timeline of events
hierarchical_section_title: Subprime mortgage crisis / Background and timeline of events
caption_attribution_description: Diagram of the Subprime Mortgage Crisis
context_page_description: The United States subprime mortgage crisis was a nationwide financial crisis which occurred between 2007 and 2010, and contributed to the U.S. financial crisis. It was triggered by a large decline in 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 and collateralized debt obligations, which initially offered higher interest rates 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.
context_section_description: The immediate cause of the crisis was the bursting of the United States housing bubble which peaked in approximately 2005–2006. An increase in loan incentives such as easy initial terms and a long-term trend of rising housing prices had encouraged borrowers to assume risky mortgages in the anticipation that they would be able to quickly refinance at easier terms. However, once interest rates began to rise and housing prices started to drop moderately in 2006–2007 in many parts of the U.S., borrowers were unable to refinance. Defaults and foreclosure activity increased dramatically as easy initial terms expired, home prices fell, and adjustable-rate mortgage (ARM) interest rates reset higher.
  As housing prices fell, global investor demand for mortgage-related securities evaporated. This became apparent by July 2007, when investment bank Bear Stearns announced that two of its hedge funds had imploded. These funds had invested in securities that derived their value from mortgages. When the value of these securities dropped, investors demanded that these hedge funds provide additional collateral. This created a cascade of selling in these securities, which lowered their value further. Economist Mark Zandi wrote that this 2007 event was "arguably the proximate catalyst" for the financial market disruption that followed.
  Several other factors set the stage for the rise and fall of housing prices, and related securities widely held by financial firms. In the years leading up to the crisis, the U.S. received large amounts of foreign money from fast-growing economies in Asia and oil-producing/exporting countries. This inflow of funds combined with low U.S. interest rates from 2002 to 2004 contributed to easy credit conditions, which fueled both housing and credit bubbles. Loans of various types (e.g., mortgage, credit card, and auto) were easy to obtain and consumers assumed an unprecedented debt load.
  As part of the housing and credit booms, the number of financial agreements called mortgage-backed securities (MBS), which derive their value from mortgage payments and housing prices, greatly increased. Such financial innovation enabled institutions and investors around the world to invest in the U.S. housing market. As housing prices declined, major global financial institutions that had borrowed and invested heavily in MBS reported significant losses. Defaults and losses on other loan types also increased significantly as the crisis expanded from the housing market to other parts of the economy. Total losses were estimated in the trillions of U.S. dollars globally.
  While the housing and credit bubbles were growing, a series of factors caused the financial system to become increasingly fragile. Policymakers did not recognize the increasingly important role played by financial institutions such as investment banks and hedge funds, also known as the shadow banking system. These entities were not subject to the same regulations as depository banking. Further, shadow banks were able to mask the extent of their risk taking from investors and regulators through the use of complex, off-balance sheet derivatives and securitizations. Economist Gary Gorton has referred to the 2007–2008 aspects of the crisis as a "run" on the shadow banking system.
  The complexity of these off-balance sheet arrangements and the securities held, as well as the interconnection between larger financial institutions, made it virtually impossible to re-organize them via bankruptcy, which contributed to the need for government bailouts. Some experts believe these shadow institutions had become as important as commercial (depository) banks in providing credit to the U.S. economy, but they were not subject to the same regulations. These institutions as well as certain regulated banks had also assumed significant debt burdens while providing the loans described above and did not have a financial cushion sufficient to absorb large loan defaults or MBS losses.
  The losses experienced by financial institutions on their mortgage-related securities impacted their ability t
caption: Domino effect as housing prices declined
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