RMBS pricing best in a decade: Resimac RMBS pricing best in a decade: Resimac 12 March 2021 6:21AM Resimac CEO Scott McWilliam Resimac group treasurer Andrew Marsden says “deal economics” in the residential mortgage-backed securities market have improved considerably since last year, with the lender paying a weighted average margin on its latest transaction that is 30 basis points lower than its previous deal in December. Resimac has completed a A$1.5 billion issue of prime RMBS, Resimac Premier Series 2021-1, which has a weighted average margin of 102 bps. The weighted average margin on the $1 billion December deal was 132 bps and back in July, when Resimac issued $500 million of RMBS, it paid an average margin of 157 bps.