Activity in the Home Affordable Modification Program’s Principal Reduction Alternative is heavily concentrated, according to an analysis by Inside Nonconforming Markets. Bank of America and Wells Fargo combined account for 51.4 percent of the non-agency principal reduction mods, based on new disclosures by the Treasury Department. The servicers’ PRA activity is outsized even compared with their overall non-agency HAMP activity. BofA and Wells combined account for 33.6 percent of active non-agency HAMP mods ... [Includes one data chart]