Impac Mortgage Holdings has continued to increase its production of non-qualified mortgages and plans to issue a $400.0 million mortgage-backed security collateralized by such loans, according to officials at the nonbank. Impac originated $289.60 million of non-QMs in 2016. In the first half of 2017, the nonbank had $416.70 million in non-QM volume. “We’ve seen a decrease in the conforming market and now month-over-month, we’re seeing an increase in the non-QM market ...