Lenders and securities traders are putting their heads together to try to revive the mortgage-insurance programs run by the FHA and Ginnie Mae after the agencies have seen their roles in the primary and secondary markets dramatically reduced in recent years. Although FHA loans comprised almost 10 percent of originations as recently as 1999, the agency’s market share has slumped significantly during the past five years. According to data gathered by Inside Mortgage Finance, FHA…