A portfolio of $16.53 million non-qualified mortgages is available for sale, according to an announcement last week by Mortgage Industry Advisory Corp. The jumbo adjustable-rate mortgages were originated by a “large Midwest bank” and are lightly seasoned, according to MIAC. The loans have an average unpaid principal balance of $688,855 and an average interest rate of 3.661 percent. The loans are largely purchase mortgages and ... [Includes two briefs]