Most major jumbo servicers increased their portfolios in 2016, according to a new ranking and analysis by Inside Nonconforming Markets. A group of 30 servicers handled an estimated $921.10 billion in jumbo mortgages as of the end of the year, up 8.7 percent from the end of 2015. Wells Fargo was the top jumbo servicer, with a $279.97 billion portfolio at yearend. While Wells steadily built up its jumbo servicing throughout the year, it lost some ... [Includes one data chart]