Full third-party due diligence reviews were completed on only 20.0 percent of the loans being pooled by Flagstar Bank into a new non-agency mortgage-backed security. Rating services delivered mixed assessments of the due diligence sampling rate, which could set a standard for the market. The $704.1 million Flagstar Mortgage Trust 2018-2 is scheduled to close at the end of the month. DBRS, Fitch Ratings, Kroll Bond Rating Agency and Moody’s Investors Service all ...