Subprime lending is a general term that refers to the practice of making loans to borrowers who do not qualify for market interest rates because of problems with their credit history or the inability to prove that they have enough income to support the monthly payment on the loan for which they are applying. Subprime loans or mortgages are risky for both creditors and debtors because of the combination of high interest rates, bad credit history, and murky personal financial situations often associated with subprime applicants. A subprime loan is one that is offered at an interest rate higher than A-paper loans due to the increased risk. Subprime, therefore, is not the same as "Alt-A", because Alt-A loans qualify for the "A-rating" by Moody's or other rating firms, albeit for an "alternative" means.

The value of U.S. subprime mortgages was estimated at $1.3 trillion as of March 2007, with over 7.5 million first-lien subprime mortgages outstanding. Approximately 16% of subprime loans with adjustable rate mortgages (ARM) were 90-days delinquent or in foreclosure proceedings as of October 2007, roughly triple the rate of 2005. By January of 2008, the delinquency rate had risen to 21%.

Subprime ARMs only represent 6.8% of the loans outstanding in the US, yet they represent 43.0% of the foreclosures started during the third quarter of 2007. A total of nearly 447,000 U.S. housing units were subject to some sort of foreclosure action from July to September 2007, including those with prime, alt-A and subprime loans. This is nearly double the 223,000 properties in the year-ago period and 34% higher than the 333,000 in the prior quarter.

The estimated value of subprime adjustable-rate mortages (ARM) resetting at higher interest rates is U.S. $400 billion for 2007 and $500 billion for 2008. Reset activity is expected to increase to a monthly peak in March 2008 of nearly $100 billion, before declining. An average of 450,000 subprime ARM are scheduled to undergo their first rate increase each quarter in 2008.

To be continue......
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