Originations of non-agency jumbo mortgages declined by 17.8 percent on an annual basis in 2017, according to a new ranking and analysis by Inside Nonconforming Markets. The sector lost market share as total mortgage originations declined by 12.3 percent during that span. Jumbo originations were down among most of the top 10 lenders, including banks and nonbanks, with many reporting weaker consumer demand, particularly as refinances became ... [Includes one data chart]