Originations of nonprime loans that don’t meet standards for qualified mortgages are beginning to ramp up while still accounting for a small share of total origination volume. Impac Mortgage Holdings, one of the most prominent originators of non-QMs, has posted sharp growth since starting to offer the loans in the third quarter of 2014. Impac originated $48.0 million in non-QMs in the third quarter of 2015, more than double the $22.3 million in non-QM originations the lender had ...