U.S. subprime crisis 4: responses

Various actions have been taken since the crisis became apparent in August 2007. In September 2008, major instability in world financial markets increased awareness and attention to the crisis. Various agencies and regulators, as well as political officials, began to take additional, more comprehensive steps to handle the crisis.

Regulatory proposals
President Barack Obama and key advisers introduced a series of regulatory proposals in June 2009. The proposals address consumer protection, executive pay, bank financial cushions or capital requirements, expanded regulation of the shadow banking system and derivatives, and enhanced authority for the Federal Reserve to safely wind-down systemically important institutions, among others. The Dodd–Frank Wall Street Reform and Consumer Protection Act was signed into law in July 2010 to address some of the causes of the crisis.

Federal Reserve and central banks
The central bank of the USA, the Federal Reserve, in partnership with central banks around the world, has taken several steps to address the crisis. Federal Reserve Chairman Ben Bernanke stated in early 2008: "Broadly, the Federal Reserve's response has followed two tracks: efforts to support market liquidity and functioning and the pursuit of our macroeconomic objectives through monetary policy." The Fed has:

• Lowered the target for the Federal funds rate from 5.25% to 2%, and the discount rate from 5.75% to 2.25%. This took place in six steps occurring between 18 September 2007 and 30 April 2008; In December 2008, the Fed further lowered the federal funds rate target to a range of 0–0.25% (25 basis points).
• Undertaken, along with other central banks, open market operations to ensure member banks remain liquid. These are effectively short-term loans to member banks collateralized by government securities. Central banks have also lowered the interest rates (called the discount rate in the USA) they charge member banks for short-term loans;
• Created a variety of lending facilities to enable the Fed to lend directly to banks and non-bank institutions, against specific types of collateral of varying credit quality. These include the Term Auction Facility (TAF) and Term Asset-Backed Securities Loan Facility (TALF).
• In November 2008, the Fed announced a $600 billion program to purchase the MBS of the GSE, to help lower mortgage rates.
• In March 2009, the Federal Open Market Committee decided to increase the size of the Federal Reserve’s balance sheet further by purchasing up to an additional $750 billion of government-sponsored enterprise mortgage-backed securities, bringing its total purchases of these securities to up to $1.25 trillion this year, and to increase its purchases of agency debt this year by up to $100 billion to a total of up to $200 billion. Moreover, to help improve conditions in private credit markets, the Committee decided to purchase up to $300 billion of longer-term Treasury securities during 2009.

According to Ben Bernanke, expansion of the Fed balance sheet means the Fed is electronically creating money, necessary "...because our economy is very weak and inflation is very low. When the economy begins to recover, that will be the time that we need to unwind those programs, raise interest rates, reduce the money supply, and make sure that we have a recovery that does not involve inflation."

The New York Times reported in February 2013 that the Fed continued to support the economy with various monetary stimulus measures: "The Fed, which has amassed almost $3 trillion in Treasury and mortgage-backed securities to promote more borrowing and lending, is expanding those holdings by $85 billion a month until it sees clear improvement in the labor market. It plans to hold short-term interest rates near zero even longer, at least until the unemployment rate falls below 6.5 percent."

Economic stimulus
On 13 February 2008, President George W. Bush signed into law a $168 billion economic stimulus package, mainly taking the form of income tax rebate checks mailed directly to taxpayers. Checks were mailed starting the week of 28 April 2008. However, this rebate coincided with an unexpected jump in gasoline and food prices. This coincidence led some to wonder whether the stimulus package would have the intended effect, or whether consumers would simply spend their rebates to cover higher food and fuel prices.

On 17 February 2009, U.S. President Barack Obama signed the American Recovery and Reinvestment Act of 2009, an $787 billion stimulus package with a broad spectrum of spending and tax cuts. Over $75 billion of which was specifically allocated to programs which help struggling homeowners. This program is referred to as the Homeowner Affordability and Stability Plan.

The U.S. government continued to run large deficits post-crisis, with the national debt rising from $10.0 trillion as of September 2008 to $16.1 trillion by September 2012. The debt increases were $1.89 trillion in fiscal year 2009, $1.65 trillion in 2010, $1.23 trillion in 2011, and $1.26 trillion in 2012.

Bank solvency and capital replenishment
Losses on mortgage-backed securities and other assets purchased with borrowed money have dramatically reduced the capital base of financial institutions, rendering many either insolvent or less capable of lending. Governments have provided funds to banks. Some banks have taken significant steps to acquire additional capital from private sources.

The U.S. government passed the Emergency Economic Stabilization Act of 2008 (EESA or TARP) during October 2008. This law included $700 billion in funding for the "Troubled Assets Relief Program" (TARP), which was used to lend funds to banks in exchange for dividend-paying preferred stock.

Another method of recapitalizing banks is for government and private investors to provide cash in exchange for mortgage-related assets (i.e., "toxic" or "legacy" assets), improving the quality of bank capital while reducing uncertainty regarding the financial position of banks. U.S. Treasury Secretary Timothy Geithner announced a plan during March 2009 to purchase "legacy" or "toxic" assets from banks. The Public-Private Partnership Investment Program involves government loans and guarantees to encourage private investors to provide funds to purchase toxic assets from banks.

As of April 2012, the government had recovered $300 billion of the $414 billion that was ultimately distributed to them via TARP. Some elements of TARP such as foreclosure prevention aid will not be paid back. Estimated taxpayer losses were $60 billion.

Bailouts and failures of financial firms
Several major financial institutions either failed, were bailed-out by governments, or merged (voluntarily or otherwise) during the crisis. While the specific circumstances varied, in general the decline in the value of mortgage-backed securities held by these companies resulted in either their insolvency, the equivalent of bank runs as investors pulled funds from them, or inability to secure new funding in the credit markets. These firms had typically borrowed and invested large sums of money relative to their cash or equity capital, meaning they were highly leveraged and vulnerable to unanticipated credit market disruptions.

The five largest U.S. investment banks, with combined liabilities or debts of $4 trillion, either went bankrupt (Lehman Brothers), were taken over by other companies (Bear Stearns and Merrill Lynch), or were bailed-out by the U.S. government (Goldman Sachs and Morgan Stanley) during 2008. Government-sponsored enterprises (GSE) Fannie Mae and Freddie Mac either directly owed or guaranteed nearly $5 trillion in mortgage obligations, with a similarly weak capital base, when they were placed into receivership in September 2008. For scale, this $9 trillion in obligations concentrated in seven highly leveraged institutions can be compared to the $14 trillion size of the U.S. economy (GDP) or to the total national debt of $10 trillion in September 2008.

Major depository banks around the world had also used financial innovations such as structured investment vehicles to circumvent capital ratio regulations. Notable global failures included Northern Rock, which was nationalized at an estimated cost of £87 billion ($150 billion). In the U.S., Washington Mutual (WaMu) was seized in September 2008 by the USA Office of Thrift Supervision (OTS). This would be followed by the shotgun wedding of Wells Fargo & Wachovia after it was speculated that without the merger Wachovia was also going to fail. Dozens of U.S. banks received funds as part of the TARP or $700 billion bailout. The TARP funds gained some controversy after PNC Financial Services received TARP money, only to turn around hours later and purchase the struggling National City Corp., which itself had become a victim of the subprime crisis.

As a result of the financial crisis in 2008, twenty-five U.S. banks became insolvent and were taken over by the FDIC. As of August 14, 2009, an additional 77 banks became insolvent. This seven-month tally surpasses the 50 banks that were seized in all of 1993, but is still much smaller than the number of failed banking institutions in 1992, 1991, and 1990. The United States has lost over 6 million jobs since the recession began in December 2007.

The FDIC deposit insurance fund, supported by fees on insured banks, fell to $13 billion in the first quarter of 2009. That is the lowest total since September, 1993.

According to some, the bailouts could be traced directly to Alan Greenspan's efforts to reflate the stock market and the economy after the tech stock bust, and specifically to a February 23, 2004 speech Mr. Greenspan made to the Mortgage Bankers Association where he suggested that the time had come to push average American borrowers into more exotic loans with variable rates, or deferred interest. This argument suggests that Mr. Greenspan sought to enlist banks to expand lending and debt to stimulate asset prices and that the Federal Reserve and US Treasury Department would back any losses that might result. As early as March 2007 some commentators predicted that a bailout of the banks would exceed $1 trillion, at a time when Ben Bernanke, Alan Greenspan and Henry Paulson all claimed that mortgage problems were "contained" to the subprime market and no bailout of the financial sector would be necessary.

Homeowner assistance
Both lenders and borrowers may benefit from avoiding foreclosure, which is a costly and lengthy process. Some lenders have offered troubled borrowers more favorable mortgage terms (i.e., refinancing, loan modification or loss mitigation). Borrowers have also been encouraged to contact their lenders to discuss alternatives.

The Economist described the issue this way in February 2009: "No part of the financial crisis has received so much attention, with so little to show for it, as the tidal wave of home foreclosures sweeping over America. Government programmes have been ineffectual, and private efforts not much better." Up to 9 million homes may enter foreclosure over the 2009–2011 period, versus one million in a typical year. At roughly U.S. $50,000 per foreclosure according to a 2006 study by the Chicago Federal Reserve Bank, 9 million foreclosures represents $450 billion in losses.

A variety of voluntary private and government-administered or supported programs were implemented during 2007–2009 to assist homeowners with case-by-case mortgage assistance, to mitigate the foreclosure crisis engulfing the U.S. One example is the Hope Now Alliance, an ongoing collaborative effort between the US Government and private industry to help certain subprime borrowers. In February 2008, the Alliance reported that during the second half of 2007, it had helped 545,000 subprime borrowers with shaky credit, or 7.7% of 7.1 million subprime loans outstanding as of September 2007. A spokesperson for the Alliance acknowledged that much more must be done.

During late 2008, major banks and both Fannie Mae and Freddie Mac established moratoriums (delays) on foreclosures, to give homeowners time to work towards refinancing.

Critics have argued that the case-by-case loan modification method is ineffective, with too few homeowners assisted relative to the number of foreclosures and with nearly 40% of those assisted homeowners again becoming delinquent within 8 months. In December 2008, the U.S. FDIC reported that more than half of mortgages modified during the first half of 2008 were delinquent again, in many cases because payments were not reduced or mortgage debt was not forgiven. This is further evidence that case-by-case loan modification is not effective as a policy tool.

In February 2009, economists Nouriel Roubini and Mark Zandi recommended an "across the board" (systemic) reduction of mortgage principal balances by as much as 20–30%. Lowering the mortgage balance would help lower monthly payments and also address an estimated 20 million homeowners that may have a financial incentive to enter voluntary foreclosure because they are "underwater" (i.e., the mortgage balance is larger than the home value).

A study by the Federal Reserve Bank of Boston indicated that banks were reluctant to modify loans. Only 3% of seriously delinquent homeowners had their mortgage payments reduced during 2008. In addition, investors who hold MBS and have a say in mortgage modifications have not been a significant impediment; the study found no difference in the rate of assistance whether the loans were controlled by the bank or by investors. Commenting on the study, economists Dean Baker and Paul Willen both advocated providing funds directly to homeowners instead of banks.

The L.A. Times reported the results of a study that found homeowners with high credit scores at the time of entering the mortgage are 50% more likely to "strategically default" – abruptly and intentionally pull the plug and abandon the mortgage – compared with lower-scoring borrowers. Such strategic defaults were heavily concentrated in markets with the highest price declines. An estimated 588,000 strategic defaults occurred nationwide during 2008, more than double the total in 2007. They represented 18% of all serious delinquencies that extended for more than 60 days in the fourth quarter of 2008.

Homeowners Affordability and Stability Plan
On 18 February 2009, U.S. President Barack Obama announced a $73 billion program to help up to nine million homeowners avoid foreclosure, which was supplemented by $200 billion in additional funding for Fannie Mae and Freddie Mac to purchase and more easily refinance mortgages. The plan is funded mostly from the EESA's $700 billion financial bailout fund. It uses cost sharing and incentives to encourage lenders to reduce homeowner's monthly payments to 31 percent of their monthly income. Under the program, a lender would be responsible for reducing monthly payments to no more than 38 percent of a borrower’s income, with government sharing the cost to further cut the rate to 31 percent. The plan also involves forgiving a portion of the borrower’s mortgage balance. Companies that service mortgages will get incentives to modify loans and to help the homeowner stay current.

Sources:

http://en.wikipedia.org/wiki/Subprime_mortgage_crisis#Responses

U.S. subprime crisis 3: impacts

Impact in the U.S.
Between June 2007 and November 2008, Americans lost more than a quarter of their net worth. By early November 2008, a broad U.S. stock index, the S&P 500, was down 45 percent from its 2007 high. Housing prices had dropped 20% from their 2006 peak, with futures markets signaling a 30–35% potential drop. Total home equity in the United States, which was valued at $13 trillion at its peak in 2006, had dropped to $8.8 trillion by mid-2008 and was still falling in late 2008. Total retirement assets, Americans' second-largest household asset, dropped by 22 percent, from $10.3 trillion in 2006 to $8 trillion in mid-2008. During the same period, savings and investment assets (apart from retirement savings) lost $1.2 trillion and pension assets lost $1.3 trillion. Taken together, these losses total $8.3 trillion.

• Real gross domestic product (GDP) began contracting in the third quarter of 2008 and did not return to growth until Q1 2010. CBO estimated in February 2013 that real U.S. GDP remained 5.5% below its potential level, or about $850 billion. CBO projected that GDP would not return to its potential level until 2017.
• The unemployment rate rose from 5% in 2008 pre-crisis to 10% by late 2009, then steadily declined to 7.6% by March 2013. The number of unemployed rose from approximately 7 million in 2008 pre-crisis to 15 million by 2009, then declined to 12 million by early 2013.
• Residential private investment (mainly housing) fell from its 2006 pre-crisis peak of $800 billion, to $400 billion by mid-2009 and has remained depressed at that level. Non-residential investment (mainly business purchases of capital equipment) peaked at $1,700 billion in 2008 pre-crisis and fell to $1,300 billion in 2010, but by early 2013 had nearly recovered to this peak.
• Housing prices fell approximately 30% on average from their mid-2006 peak to mid-2009 and remained at approximately that level as of March 2013.
• Stock market prices, as measured by the S&P 500 index, fell 57% from their October 2007 peak of 1,565 to a trough of 676 in March 2009. Stock prices began a steady climb thereafter and returned to record levels by April 2013.
• The net worth of U.S. households and non-profit organizations fell from from a peak of approximately $67 trillion in 2007 to a trough of $52 trillion in 2009, a decline of $15 trillion or 22%. It began to recover thereafter and was $66 trillion by Q3 2012.
• U.S. total national debt rose from 66% GDP in 2008 pre-crisis to over 103% by the end of 2012. Martin Wolf and Paul Krugman argued that the rise in private savings and decline in investment fueled a large private sector surplus, which drove sizable budget deficits.

Members of USA minority groups received a disproportionate number of subprime mortgages, and so have experienced a disproportionate level of the resulting foreclosures. Recent research shows that complex mortgages were chosen by prime borrowers with high income levels seeking to purchase expensive houses relative to their incomes. Borrowers with complex mortgages experienced substantially higher default rates than borrowers with traditional mortgages with similar characteristics. The crisis had a devastating effect on the U.S. auto industry. New vehicle sales, which peaked at 17 million in 2005, recovered to only 12 million by 2010.

Impact on Europe
The crisis in Europe generally progressed from banking system crises to sovereign debt crises, as many countries elected to bailout their banking systems using taxpayer money. Greece was different in that it concealed large public debts in addition to issues within its banking system. Several countries received bailout packages from the "troika" (European Commission, European Central Bank, International Monetary Fund), which also implemented a series of emergency measures.

Many European countries embarked on austerity programs, reducing their budget deficits relative to GDP from 2010 to 2011. For example, according to the CIA World Factbook Greece improved its budget deficit from 10.4% GDP in 2010 to 9.6% in 2011. Iceland, Italy, Ireland, Portugal, France, and Spain also improved their budget deficits from 2010 to 2011 relative to GDP.

However, with the exception of Germany, each of these countries had public-debt-to-GDP ratios that increased (i.e., worsened) from 2010 to 2011, as indicated in the chart at right. Greece's public-debt-to-GDP ratio increased from 143% in 2010 to 165% in 2011. This indicates that despite improving budget deficits, GDP growth was not sufficient to support a decline (improvement) in the debt-to-GDP ratio for these countries during this period. Eurostat reported that the debt to GDP ratio for the 17 Euro area countries together was 70.1% in 2008, 79.9% in 2009, 85.3% in 2010, and 87.2% in 2011.

Unemployment is another variable that might be considered in evaluating austerity measures. According to the CIA World Factbook, from 2010 to 2011, the unemployment rates in Spain, Greece, Ireland, Portugal, and the UK increased. France and Italy had no significant changes, while in Germany and Iceland the unemployment rate declined. Eurostat reported that Eurozone unemployment reached record levels in September 2012 at 11.6%, up from 10.3% the prior year. Unemployment varied significantly by country.

Economist Martin Wolf analyzed the relationship between cumulative GDP growth from 2008-2012 and total reduction in budget deficits due to austerity policies (see chart at right) in several European countries during April 2012. He concluded that: "In all, there is no evidence here that large fiscal contractions [budget deficit reductions] bring benefits to confidence and growth that offset the direct effects of the contractions. They bring exactly what one would expect: small contractions bring recessions and big contractions bring depressions." Changes in budget balances (deficits or surpluses) explained approximately 53% of the change in GDP, according to the equation derived from the IMF data used in his analysis.

Economist Paul Krugman analyzed the relationship between GDP and reduction in budget deficits for several European countries in April 2012 and concluded that austerity was slowing growth, similar to Martin Wolf. He also wrote: "... this also implies that 1 euro of austerity yields only about 0.4 euros of reduced deficit, even in the short run. No wonder, then, that the whole austerity enterprise is spiraling into disaster."

Financial market impacts, 2007
The crisis began to affect the financial sector in February 2007, when HSBC, the world's largest (2008) bank, wrote down its holdings of subprime-related MBS by $10.5 billion, the first major subprime related loss to be reported. During 2007, at least 100 mortgage companies either shut down, suspended operations or were sold. Top management has not escaped unscathed, as the CEOs of Merrill Lynch and Citigroup resigned within a week of each other in late 2007. As the crisis deepened, more and more financial firms either merged, or announced that they were negotiating seeking merger partners.

During 2007, the crisis caused panic in financial markets and encouraged investors to take their money out of risky mortgage bonds and shaky equities and put it into commodities as "stores of value". Financial speculation in commodity futures following the collapse of the financial derivatives markets has contributed to the world food price crisis and oil price increases due to a "commodities super-cycle." Financial speculators seeking quick returns have removed trillions of dollars from equities and mortgage bonds, some of which has been invested into food and raw materials.

Mortgage defaults and provisions for future defaults caused profits at the 8533 USA depository institutions insured by the Federal Deposit Insurance Corporation to decline from $35.2 billion in 2006 Q4 to $646 million in the same quarter a year later, a decline of 98%. 2007 Q4 saw the worst bank and thrift quarterly performance since 1990. In all of 2007, insured depository institutions earned approximately $100 billion, down 31% from a record profit of $145 billion in 2006. Profits declined from $35.6 billion in 2007 Q1 to $19.3 billion in 2008 Q1, a decline of 46%.

Financial market impacts, 2008
As of August 2008, financial firms around the globe have written down their holdings of subprime related securities by US$501 billion. The IMF estimates that financial institutions around the globe will eventually have to write off $1.5 trillion of their holdings of subprime MBSs. About $750 billion in such losses had been recognized as of November 2008. These losses have wiped out much of the capital of the world banking system. Banks headquartered in nations that have signed the Basel Accords must have so many cents of capital for every dollar of credit extended to consumers and businesses. Thus the massive reduction in bank capital just described has reduced the credit available to businesses and households.

When Lehman Brothers and other important financial institutions failed in September 2008, the crisis hit a key point. During a two-day period in September 2008, $150 billion were withdrawn from USA money funds. The average two-day outflow had been $5 billion. In effect, the money market was subject to a bank run. The money market had been a key source of credit for banks (CDs) and nonfinancial firms (commercial paper). The TED spread, a measure of the risk of interbank lending, quadrupled shortly after the Lehman failure. This credit freeze brought the global financial system to the brink of collapse. In a nine-day period from Oct. 1-9, the S&P 500 fell a staggering 251 points, losing 21.6% of its value. The week of Oct. 6-10 saw the largest percentage drop in the history of the Dow Jones Industrial Average - even worse than any single week in the Great Depression.

The response of the USA Federal Reserve, the European Central Bank, and other central banks was immediate and dramatic. During the last quarter of 2008, these central banks purchased US$2.5 trillion of government debt and troubled private assets from banks. This was the largest liquidity injection into the credit market, and the largest monetary policy action, in world history. The governments of European nations and the USA also raised the capital of their national banking systems by $1.5 trillion, by purchasing newly issued preferred stock in their major banks. On Dec. 16, 2008, the Federal Reserve cut the Federal funds rate to 0-0.25%, where it has remained since then; this period of zero interest-rate policy is unprecedented in U.S. history.

However, some economists state that Third-World economies, such as the Brazilian and Chinese ones, will not suffer as much as those from more developed countries. However, other analysts have seen Brazil as entering their own sub-prime crisis.

The International Monetary Fund estimated that large U.S. and European banks lost more than $1 trillion on toxic assets and from bad loans from January 2007 to September 2009. These losses are expected to top $2.8 trillion from 2007–10. U.S. banks losses were forecast to hit $1 trillion and European bank losses will reach $1.6 trillion. The IMF estimated that U.S. banks were about 60 percent through their losses, but British and eurozone banks only 40 percent.

Sustained effects
In Spring 2011 there were about a million homes in foreclosure in the United States, several million more in the pipeline, and 872,000 previously foreclosed homes in the hands of banks. Sales were slow; economists estimated that it would take three years to clear the backlogged inventory. According to Mark Zandi of Moody’s Analytics, home prices were falling and could be expected to fall further during 2011. However, the rate of new borrowers falling behind in mortgage payments had begun to decrease.

The crisis had a significant and long-lasting impact on U.S. employment. During the Great Recession, 8.5 million jobs were lost from the peak employment in early 2008 of approximately 138 million to the trough in February 2010 of 129 million, roughly 6% of the workforce. From February 2010 to September 2012, approximately 4.3 million jobs were added, offsetting roughly half the losses.

Research indicates recovery from financial crisis can be protracted, with lengthy periods of high unemployment and substandard economic growth. Economist Carmen Reinhart stated in August 2011: "Debt de-leveraging [reduction] takes about seven years...And in the decade following severe financial crises, you tend to grow by 1 to 1.5 percentage points less than in the decade before, because the decade before was fueled by a boom in private borrowing, and not all of that growth was real. The unemployment figures in advanced economies after falls are also very dark. Unemployment remains anchored about five percentage points above what it was in the decade before."

Sources:

http://en.wikipedia.org/wiki/Subprime_mortgage_crisis#Impacts

U.S. subprime crisis 2: causes

The crisis can be attributed to a number of factors pervasive in both housing and credit markets, factors which emerged over a number of years. Causes proposed include the inability of homeowners to make their mortgage payments (due primarily to adjustable-rate mortgages resetting, borrowers overextending, predatory lending, and speculation), overbuilding during the boom period, risky mortgage products, increased power of mortgage originators, high personal and corporate debt levels, financial products that distributed and perhaps concealed the risk of mortgage default, bad monetary and housing policies, international trade imbalances, and inappropriate government regulation.  Excessive consumer housing debt was in turn caused by the mortgage-backed security, credit default swap, and collateralized debt obligation sub-sectors of the financial industry, which were offering irrationally low interest rates and irrationally high levels of approval to subprime mortgage consumers because they were calculating aggregate risk using Gaussian copula formulas that strictly assumed the independence of individual component mortgages, when in fact the credit-worthiness almost every new subprime mortgage was highly correlated with that of any other because of linkages through consumer spending levels which fell sharply when property values began to fall during the initial wave of mortgage defaults. Debt consumers were acting in their rational self-interest, because they were unable to audit the finance industry's opaque faulty risk pricing methodology.

Among the important catalysts of the subprime crisis were the influx of money from the private sector, the banks entering into the mortgage bond market, government policies aimed at expanding home ownership, speculation by many home buyers, and the predatory lending practices of the the mortgage lenders, specifically the adjustable-rate mortgage, 2-28 loan, that mortgage lenders sold directly or indirectly via mortgage brokers. On Wall Street and in the financial industry, moral hazard lay at the core of many of the causes.

In its "Declaration of the Summit on Financial Markets and the World Economy," dated 15 November 2008, leaders of the Group of 20 cited the following causes:

During a period of strong global growth, growing capital flows, and prolonged stability earlier this decade, market participants sought higher yields without an adequate appreciation of the risks and failed to exercise proper due diligence. At the same time, weak underwriting standards, unsound risk management practices, increasingly complex and opaque financial products, and consequent excessive leverage combined to create vulnerabilities in the system. Policy-makers, regulators and supervisors, in some advanced countries, did not adequately appreciate and address the risks building up in financial markets, keep pace with financial innovation, or take into account the systemic ramifications of domestic regulatory actions.

Federal Reserve chair Ben Bernanke testified in September 2010 regarding the causes of the crisis. He wrote that there were shocks or triggers (i.e., particular events that touched off the crisis) and vulnerabilities (i.e., structural weaknesses in the financial system, regulation and supervision) that amplified the shocks. Examples of triggers included: loses on subprime mortgage securities that began in 2007 and a run on the shadow banking system that began in mid-2007, which adversely affected the functioning of money markets. Examples of vulnerabilities in the private sector included: financial institution dependence on unstable sources of short-term funding such as repurchase agreements or Repos; deficiencies in corporate risk management; excessive use of leverage (borrowing to invest); and inappropriate usage of derivatives as a tool for taking excessive risks. Examples of vulnerabilities in the public sector included: statutory gaps and conflicts between regulators; ineffective use of regulatory authority; and ineffective crisis management capabilities. Bernanke also discussed "Too big to fail" institutions, monetary policy, and trade deficits.

During May 2010, Warren Buffett and Paul Volcker separately described questionable assumptions or judgments underlying the U.S. financial and economic system that contributed to the crisis. These assumptions included: 1) Housing prices would not fall dramatically; 2) Free and open financial markets supported by sophisticated financial engineering would most effectively support market efficiency and stability, directing funds to the most profitable and productive uses; 3) Concepts embedded in mathematics and physics could be directly adapted to markets, in the form of various financial models used to evaluate credit risk; 4) Economic imbalances, such as large trade deficits and low savings rates indicative of over-consumption, were sustainable; and 5) Stronger regulation of the shadow banking system and derivatives markets was not needed.

The U.S. Financial Crisis Inquiry Commission reported its findings in January 2011. It concluded that "the crisis was avoidable and was caused by: Widespread failures in financial regulation, including the Federal Reserve's failure to stem the tide of toxic mortgages; Dramatic breakdowns in corporate governance including too many financial firms acting recklessly and taking on too much risk; An explosive mix of excessive borrowing and risk by households and Wall Street that put the financial system on a collision course with crisis; Key policy makers ill prepared for the crisis, lacking a full understanding of the financial system they oversaw; and systemic breaches in accountability and ethics at all levels."

Sources:

http://en.wikipedia.org/wiki/Subprime_mortgage_crisis#Causes