MGIC Posts First Profit in 12 Quarters as Mortgage Insurer's Costs Decline Bloomberg MGIC Investment Corp., the largest US mortgage insurer, posted its first profit in 12 quarters as claims costs declined. … MGIC shares boosted by surprise profit MarketWatch MGIC Investment swings to second-quarter profit MarketWatch MGIC Investment Corporation Reports Second Quarter 2010 Results MarketWatch (press release) RTT News