Flagstar Bank looks to have found an agreeable due diligence sampling rate for loans in its prime non-agency mortgage-backed securities. The company is preparing to issue a $476.1 million prime non-agency MBS, according to presale reports published last week. It’s the second issuance in a row from Flagstar where 30.0 percent of the loans were subject to third-party reviews. Only 20.0 percent of the loans in a $704.1 million deal Flagstar issued in April were subject to ...