By the 1990s, Fannie’s chief executive could boast, without much exaggeration, that “we are the equivalent of a Federal Reserve system for housing.” At their pinnacle the two mortgage giants—neither of them an originator of loans—owned or guaranteed some 55 percent of the $11 trillion U.S. mortgage market. Beginning in the 1980s, the two companies also became important conduits for the business of mortgage-backed securities. Wall Street loved the fees it collected from securitizing all kinds of debt, from car loans to credit card receivables, and Fannie’s and Freddie’s portfolios of mortgages
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