The Office of the Comptroller of the Currency’s denial of favorable capital treatment to a non-agency MBS issued by JPMorgan Chase last year could hinder efforts aimed at convincing banks to return to the non-agency MBS market, according to industry analysts. JPMorgan Chase issued two unique non-agency MBS last year with a total unpaid principal balance of $4.53 billion. The so-called portfolio risk-transfer deals accounted for a whopping 48.6 percent of the prime non-agency MBS issued in 2016. Chase packaged...