Originations of non-agency jumbo mortgages increased in the second quarter of 2017, according to a new ranking and analysis by Inside Nonconforming Markets. But halfway through 2017, volume is lagging the production seen last year. An estimated $83.0 billion of non-agency jumbos were originated in the second quarter, up 18.6 percent from the previous period. In the first half of 2017, an estimated $153.0 billion of jumbos were originated, down ... [Includes one data chart]