In February 2004, the Chairman of the Federal Reserve, Alan Greenspan, testified before the Senate Committee on Banking, Housing, and Urban Affairs:
Because Fannie and Freddie can borrow at a subsidized rate, they have been able to pay higher prices to originators for their mortgages than can potential competitors and to gradually but inexorably take over the market for conforming mortgages. This process has provided Fannie and Freddie with a powerful vehicle and incentive for achieving extremely rapid growth of their balance sheets. The resultant scale gives Fannie and Freddie additional advantages that potential private-sector competitors cannot overcome. Importantly, the scale itself has reinforced investors' perceptions that, in the event of a crisis involving Fannie and Freddie, policymakers would have little alternative than to have the taxpayers explicitly stand behind the GSE debt. This view is widespread in the marketplace despite the privatization of Fannie and Freddie and their control by private shareholders, because these institutions continue to have government missions, a line of credit with the Treasury, and other government benefits, which confer upon them a special status in the eyes of many investors.