Subservicing specialists ended the third quarter with an estimated $1.80 trillion of contracts on their books, an 11.8 percent sequential gain and a 22.4 percent improvement from the same period a year ago, according to exclusive survey figures compiled by Inside Mortgage Finance. At the end of September, subservicers handled 17.8 percent of the $10.12 trillion residential loan market. A year ago, the sector had a market share of 14.8 percent. Some of the growth comes...[Includes one data table]