Originations of non-agency jumbo mortgages in 2015 outpaced total originations, helping to increase the jumbo sector’s market share, according to a new ranking and analysis by Inside Nonconforming Markets. Fueled by bank demand, an estimated $328.0 billion in jumbos were originated in 2015, up 39.6 percent compared with 2014. Total first-lien originations increased by 33.5 percent in 2015 compared with the previous year, according to ... [Includes one data chart]