For most of the year, it’s been an unpleasant ride for the nation’s mortgage insurers: Ugly share price performance, lower revenues (though not awful), and the fear that any day now the FHA might lower its premiums and cut into private MI market share. But over the past few weeks, policy winds in Washington have shifted with analysts rethinking the short-term prospects for the sector. According to a recent report from FBR & Co., “policy ... [Includes one data chart]