The Roosevelt administration pushed this and other programs affecting housing finance much further. In 1934, his administration oversaw the creation of the Federal Housing Administration (FHA). By providing a federally backed insurance system for mortgage lenders, the FHA was designed to encourage lenders to offer mortgages on more attractive terms.
This intervention appears to have worked in that, by the 1950s, most new mortgages were for thirty years at fixed rates, and down payment requirements had fallen to about 20 percent. In 1938, the Congress chartered the Federal National Mortgage Association, or Fannie Mae, as it came to be known.