Although most of the heavy lifting in writing new rules for the mortgage industry has passed, federal regulators still have some significant projects in the works, according to recently released semiannual regulatory agendas. The Federal Housing Finance Agency expects to release a proposed “duty-to-serve” regulation for Fannie Mae and Freddie Mac by the end of this year. The rulemaking was mandated by the 2008 Housing and Economic Recovery Act but hasn’t gotten much attention since the agency published an advance notice of proposed rulemaking back in August 2009. The FHFA is...