As mortgage insurers rally around the call for expanded risk sharing, the Federal Housing Finance Agency confirmed this week that it’s exploring the possibility of pilot testing risk-sharing through deeper mortgage insurance coverage. The U.S. Mortgage Insurers trade group said that deeper MI coverage would reduce risks to taxpayers while allowing the GSEs to lower their fees. “And with lower GSE fees, this approach would reduce costs to borrowers. In addition, MI can be used to provide front-end risk sharing on loans with down payments greater than 20 percent,” it said. A prudently underwritten 5 percent down payment loan with MI actually reduces taxpayer exposure below a comparable 20 percent down payment loan without MI, according...