With housing-finance reform gaining momentum, the Milken Institute said bringing it over the finish line requires policymakers to address the technical issues in the proposed multiple-guarantor model or one based on private insurance. Failing to address those issues would leave the housing-finance system in worse shape than keeping Fannie Mae and Freddie Mac in conservatorship, the organization said in a new analysis. The multiple-guarantor model suggests attracting new guarantors to promote competition in the market and end the GSE duopoly. But the authors of the paper, which include Erik Kaplan, Michael Stegman, Phillip Swagel and Ted Tozer, said that’s a two-fold challenge that includes determining how to provide space for new guarantors to enter the...