NEW YORK--(BUSINESS WIRE)--The inclusion of a Transaction Manager (TM) in new U.S. RMBS transactions would likely benefit investors in higher loan default scenarios, according to Fitch Ratings. In particular, TM's would provide greater servicer accountability in new RMBS through servicer oversight and more transparent investor reporting. In an effectively designed framework, the TM would bear responsibility for coordinating with all transaction parties, including servicers, trustees, custodians