MELBOURNE (S&P Global Ratings) April 4, 2024--S&P Global Ratings today assigned its preliminary rating to the class A-R prime residential mortgage-backed securities (RMBS) to be issued by Perpetual Trustee Co. Ltd. as trustee for Progress 2018-1 Trust (see list). Progress 2018-1 Trust is a securitization of prime residential mortgages originated by AMP Bank Ltd. We have assigned the preliminary rating in anticipation of the refinancing of the existing class A notes with class A-R notes. The assigned preliminary rating reflects: Perpetual Trustee Co. issuing an expected A$162 million in class A-R notes. Our view of the credit risk of the underlying collateral portfolio. As of Feb. 29, 2024, the pool's current weighted-average loan-to-value ratio is 54.6% and weighted-average seasoning is