Secondary markets No Quick Fix for New Private Label RMBS in 2015: Fitch Published December 9, 2014 3:19 PM | Updated January 6, 2020 1:01 PM 3:08 Facebook Twitter LinkedIn Email Investor confidence and a need for further structural reform remain among constraints for slow but growing non-agency residential mortgage-backed securities issuance. Meanwhile, legacy collateral continues to help support the market.