The first post-crisis prime non-agency mortgage-backed security from Flagstar Bank looks a lot like other deals issued in recent years, including exceptionally strong underwriting standards. However, the bank did break from the pack slightly with a few features in the new issuance. The $443.79 million Flagstar Mortgage Trust 2017-1 received AAA ratings with credit enhancement of 6.25 percent on the senior tranche. The deal was predominantly backed by non-agency jumbos, but ...