"We are able to adopt this new, national down payment requirement, even in markets where home prices are declining, because our new automated underwriting risk assessment model DU Version 7.0 will limit risk layering and assess each loan more precisely," Sullivan added. "At the same time, we believe that equity matters, especially in this market. Down payments are a critical success factor in homeownership -- and responsible lending is good business."

Since the housing correction began, Fannie Mae has expanded its mortgage guaranty business to serve the market's urgent need for stability, liquidity and affordability. The company also undertook steps to help protect borrowers, manage the increased credit risk in the market, and fortify the company's capital position. Among these steps, the company has continued to assess and establish new pricing, eligibility and underwriting criteria for its business that more accurately reflect the current risks in the housing market and guard against the potential for foreclosure. These changes have been incorporated into DU and have included adjustments to credit risk assessment, loan-to-value ratios and down payment requirements, among other factors.

Among the changes in response to market conditions, in December 2007 Fannie Mae adopted a "Maximum Financing in Declining Markets Policy" that restricted the loan-to-value ratios on properties in markets where home prices are declining, essentially requiring higher down payments in these markets. The new single national down payment policy announced today will supersede that policy.

Fannie Mae Senior Vice President Jeff Hayward stressed the company's commitment to special affordable lending programs to support homeownership for families of modest means. "We are stepping up to provide more liquidity and affordability to some of the most distressed communities while also seeking at least a 3 percent down payment investment through our Desktop Underwriter system from borrowers to help ensure their success."