Via Econbrowser: Fast and Easy Fannie

From page 102 of Fannie’s 2007 Annual Report, as of the end of 2007, the enterprise had leveraged $44 B in stockholders’ equity with $796 B in short- and long-term debt to acquire $761 B in mortgages either held outright or intended for resale or trading. I read that as an equity cushion against a 5.8% loss on the mortgages held directly (44/761 = 0.058). But in addition (page 1), Fannie has guaranteed $2.1 trillion in separate mortgage-backed securities it has sold to outside investors, for a ratio of core capital to total book of business of 1.6%.

From the beginning, my conception of a really big financial meltdown would be one that pulls one of the GSEs into insolvency. Please tell me why it can’t happen.