First effects of the bubble's collapse,

One of the first victims was Northern Rock, a medium-sized British bank. The highly leveraged nature of its business led the bank to request security from the Bank of England. This in turn led to investor panic and a bank run in mid-September 2007. Calls by Liberal Democrat Shadow Chancellor Vince Cable to nationalise the institution were initially ignored; in February 2008, however, the British government (having failed to find a private sector buyer) relented, and the bank was taken into public hands. Northern Rock's problems proved to be an early indication of the troubles that would soon befall other banks and financial institutions.

Initially the companies affected were those directly involved in home construction and mortgage lending such as Northern Rock and Countrywide Financial. Financial institutions which had engaged in the securitization of mortgages such as Bear Stearns then fell prey. Later on, Bear Stearns was acquired by JP Morgan Chase through deliberate assistance from the US government. Its stock price plunged to $3 in reaction to the buyout offer of $2 by JP Morgan Chase, well below its 52 week high of $134. Subsequently, the acquisition price was raised to $10 by JP Morgan. On July 11, 2008, the largest mortgage lender in the US, IndyMac Bank, collapsed, and federal regulators seized its assets after the mortgage lender succumbed to the pressures of tighter credit, tumbling home prices and rising foreclosures. That day the financial markets plunged as investors tried to gauge whether the government would attempt to save mortgage lenders Fannie Mae and Freddie Mac, which it did by placing the two companies into federal conservatorship on September 7, 2008 after the crisis further accelerated in late summer.

See also: Federal takeover of Fannie Mae and Freddie Mac
The media have repeatedly argued that the crisis then began to affect the general availability of credit to non-housing related businesses and to larger financial institutions not directly connected with mortgage lending. While this is true, the reasons given in media reporting are usually inaccurate. Dean Baker has repeatedly explained the actual, underlying problem:

"Yes, consumers and businesses can't get credit as easily as they could a year ago. There is a really good reason for tighter credit. Tens of millions of homeowners who had substantial equity in their homes two years ago have little or nothing today. Businesses are facing the worst downturn since the Great Depression. This matters for credit decisions. A homeowner with equity in her home is very unlikely to default on a car loan or credit card debt. They will draw on this equity rather than lose their car and/or have a default placed on their credit record. On the other hand, a homeowner who has no equity is a serious default risk. In the case of businesses, their creditworthiness depends on their future profits. Profit prospects look much worse in November 2008 than they did in November 2007 (of course, to clear-eyed analysts, they didn't look too good a year ago either). While many banks are obviously at the brink, consumers and businesses would be facing a much harder time getting credit right now even if the financial system were rock solid. The problem with the economy is the loss of close to $6 trillion in housing wealth and an even larger amount of stock wealth.


The New York City headquarters of Lehman Brothers.Economists, economic policy makers and economic reporters virtually all missed the housing bubble on the way up. If they still can't notice its impact as the collapse of the bubble throws into the worst recession in the post-war era, then they are in the wrong profession."
At the heart of the portfolios of many of these institutions were investments whose assets had been derived from bundled home mortgages. Exposure to these mortgage-backed securities, or to the credit derivatives used to insure them against failure, threatened an increasing number of firms such as Lehman Brothers, AIG, Merrill Lynch, and HBOS.

Other firms that came under pressure included Washington Mutual, the largest savings and loan association in the United States, and the remaining large investment firms, Morgan Stanley and Goldman Sachs.