Originations of jumbo mortgages increased by 16.3 percent in 2016 but the sector’s share of total originations declined somewhat from the previous year, according to a ranking and analysis by Inside Mortgage Finance of newly released Home Mortgage Disclosure Act data. Some $340.88 billion of jumbos were originated in 2016, with banks dominating the ranks of the top lenders. Jumbos accounted for 17.5 percent of total originations last year, down from ... [Includes one data chart]