The five-year transition toward a non-agency market contemplated in government-sponsored enterprise reform legislation in the Senate is far from guaranteed, according to industry participants. A number of questions have been raised about the timing and the ability of private players to replace the GSEs. “The idea that ‘if you build it, they will come,’ may work in the movies, but you are playing with the nation’s housing-finance system,” James Millstein, chairman and CEO of Millstein & Co., an advisory group ...