PLEASANTON, Calif.--(BUSINESS WIRE)--Purchase loans as a percentage of lenders' overall mortgage volume eclipsed 50 percent in April, according to the latest Origination Insight Report released by Ellie Mae® (NYSE:ELLI), a leading provider of innovative on-demand software solutions and services for the residential mortgage industry. Last month’s overall purchase share of 52 percent represented a 6 percent jump from March. According to the latest report, the average closing period for all loans