The non-qualified mortgage share of Impac Mortgage Holding’s total originations has increased significantly in the past year. The nonbank lender has enhanced its marketing efforts for such loans as the volume of conventional refinances has declined. Non-QMs accounted for 40.9 percent of Impac’s $853.2 million total originations in the third quarter of 2018 compared with 11.5 percent of $2.08 billion of originations a year ago. Impac’s non-QM originations increased 45.9 percent to $349.2 million ...