An affiliate of Bayview Asset Management issued a $230.0 million non-agency mortgage-backed security this week largely stocked with seasoned mortgages, including one non-qualified mortgage. DBRS and Fitch Ratings placed AAA ratings on Bayview Mortgage Fund IVc Trust 2017-RT3, without putting much emphasis on the non-QM. Non-QMs had accounted for 2.1 percent of a $125.82 million MBS from Bayview that priced in July and 1.0 percent of a $208.13 million deal it priced in April. The sponsor of the deal will retain...