Most major servicers of jumbo mortgages increased their portfolios in the third quarter, according to a new ranking and analysis by Inside Nonconforming Markets. Combined, 30 servicers handled an estimated $1.06 trillion of jumbo mortgages as of the end of September, up 2.7 percent sequentially and 10.7 percent from a year ago. Only four of the servicers posted lower jumbo portfolios on an annual basis, and one of the firms, Ocwen Financial, is under ... [Includes one data chart]