Impac Mortgage Holdings increased its originations of non-qualified mortgages in the first quarter of 2015. The nonbank had $11.3 million in originations of its AltQM products during the quarter, topping the $7.0 million in non-QM production Impac had in the second half of 2014. Underwriting standards for jumbo mortgages continued to loosen in April, according to the Mortgage Bankers Association. Underwriting for jumbos has loosened almost every month since ... [Includes three briefs]