|FEDERAL NATIONAL MORTGAGE ASSOCIATION FANNIE MAE filed this Form 10-Q on 08/05/2011|
the time of purchase. For the first half of 2011, these loans accounted for 19% of our single-family business volume.
The prolonged and severe decline in home prices has resulted in the overall estimated weighted average mark-to-market LTV ratio of our single-family conventional guaranty book of business to remain high at 78% as of June 30, 2011, and 77% as of December 31, 2010. The portion of our single-family conventional guaranty book of business with an estimated mark-to-market LTV ratio greater than 100% was 17% as of June 30, 2011, and 16% as of December 31, 2010. If home prices decline further, more loans may have mark-to-market LTV ratios greater than 100%, which increases the risk of delinquency and default.
Alt-A and Subprime Loans
Our exposure to Alt-A and subprime loans included in our single-family conventional guaranty book of business, as defined in this section, does not include (1) our investments in private-label mortgage-related securities backed by Alt-A and subprime loans or (2) resecuritizations, or wraps, of private-label mortgage-related securities backed by Alt-A mortgage loans that we have guaranteed. See Consolidated Balance Sheet AnalysisInvestments in Mortgage-Related SecuritiesInvestments in Private-Label Mortgage-Related Securities for a discussion of our exposure to private-label mortgage-related securities backed by Alt-A and subprime loans. As a result of our decision to discontinue the purchase of newly originated Alt-A loans, except for those that represent the refinancing of an existing Fannie Mae loan, we expect our acquisitions of Alt-A mortgage loans to continue to be minimal in future periods and the percentage of the book of business attributable to Alt-A will continue to decrease over time. We are also not currently acquiring newly originated subprime loans. We have classified a mortgage loan as Alt-A if the lender that delivered the loan to us classified the loan as Alt-A based on documentation or other features. We have classified a mortgage loan as subprime if the loan was originated by a lender specializing in subprime business or by a subprime division of a large lender. We exclude from the subprime classification loans originated by these lenders if we acquired the loans in accordance with our standard underwriting criteria, which typically require compliance by the seller with our Selling Guide (including standard representations and warranties) and/or evaluation of the loans through our Desktop Underwriter system. We apply our classification criteria in order to determine our Alt-A and subprime loan exposures; however, we have other loans with some features that are similar to Alt-A and subprime loans that we have not classified as Alt-A or subprime because they do not meet our classification criteria. The unpaid principal balance of Alt-A loans included in our single-family conventional guaranty book of business of $195.3 billion as of June 30, 2011, represented approximately 7.0% of our single-family conventional guaranty book of business. The unpaid principal balance of subprime loans included in our single-family conventional guaranty book of business of $6.2 billion as of June 30, 2011, represented approximately 0.2% of our single-family conventional guaranty book of business. See Table 35: Risk Characteristics of Single-Family Conventional Business Volume and Guaranty Book of Business for additional information on our single-family book of business.
Jumbo-Conforming and High-Balance Loans
The outstanding unpaid principal balance of our jumbo-conforming and high-balance loans was $126.4 billion, or 4.5% of our single-family conventional guaranty book of business, as of June 30, 2011 and $109.7 billion, or 3.9% of our single-family conventional guaranty book of business, as of December 31, 2010. The standard conforming loan limit for a one-unit property was $417,000 in 2011 and 2010 (higher in some areas). Our loan limits are currently higher in specified high-cost areas, reaching as high as $729,750 for one-unit properties. Unless Congress acts to extend current law, our loan limits for loans originated after September 30, 2011 will decrease in such specified high-cost areas to an amount not to exceed $625,500 for one-unit properties. Unlike FHA, which will not be subject to lower loan limits for refinancing its existing jumbo and high-balance loans, our revised loan limits would apply to the refinancing of our existing jumbo-conforming and high-balance loans. See BusinessOur Charter and Regulation of Our ActivitiesCharter ActLoan Standards in our 2010 Form 10-K for additional information on our loan limits.