A handful of firms service the majority of loans included in jumbo mortgage-backed securities issued since 2010. Analysts at Wells Fargo Securities noted that prepayment rates vary somewhat among the servicers, offering pockets of value for jumbo MBS investors. Wells Fargo analysts said $25.26 billion in mortgages included in jumbo MBS issued in 2010 and beyond remain outstanding. The top five servicers handle 83.3 percent of the loans, with Cenlar alone claiming ...