Mortgage Guaranty Insurance Corp. will readjust its current premium rates to meet its modest return-on-equity goal and achieve limited growth in its insurance-in-force in 2016, but whether this will precipitate similar moves across the private mortgage insurance industry remains to be seen. In announcing the company’s fourth quarter 2015 results, Patrick Sinks, chief executive officer of MGIC Investment Corp. and Mortgage Guaranty Insurance Corp., disclosed plans to revise premium rates to “generate comparable returns” across the spectrum of loans the company insures. MGIC expects...