Federal financial regulators are still sifting through stacks of criticism about their controversial risk-retention proposal for the MBS and ABS market and have not yet decided whether to start over again with a new proposed rule, as most industry groups have urged them to do. The agencies are also getting a lot of push from Capitol Hill to re-think the original proposal, which was released in late March. “I am very concerned that if the qualified residential mortgage definition being worked out by regulators isn’t broad enough, it could hurt the housing market, especially...