With qualified-mortgage underwriting requirements set to take effect Jan. 10, the rating services are beginning to detail the role QM status will play in ratings for non-agency mortgage-backed securities. Fitch Ratings appears to be the furthest along in adjusting its ratings process to account for the Consumer Financial Protection Bureau’s ability-to-repay rule and QM standards. The rating service this week released its initial perspective for rating non-agency MBS with loans originated in a QM world ...