Many servicers increased their jumbo portfolios during the second quarter, including both banks and nonbanks, according to a new ranking and analysis by Inside Nonconforming Markets. A group of 30 servicers handled an estimated $863.40 billion in jumbo mortgages as of the end of June, up 2.0 percent from the previous quarter and up 10.7 percent from the same time last year. Wells Fargo, the top jumbo lender, is also the largest jumbo servicer ... [Includes one data chart]