Morgan Stanley Residential Mortgage Loan Trust 2025-DSC1's issuance is an RMBS transaction backed by first-lien, fixed- and adjustable-rate, fully amortizing residential mortgage loans (some with interest-only periods) to both prime and nonprime borrowers. The loans are secured by single-family residential properties including townhouses, planned unit developments, condominiums, two- to four-family residential properties, and five to 10 unit residential properties. We assigned our preliminary ratings to the class A-1-A, A-1-B, A-1, A-2, A-3, M-1, B-1, and B-2 certificates. The preliminary ratings reflect our view of the transaction's collateral composition, credit enhancement, and representation and warranty framework, among other factors. ENGLEWOOD (S&P Global Ratings) April 23, 2025--S&P Global Ratings today assigned its preliminary ratings to Morgan Stanley Residential Mortgage Loan Trust 2025-DSC1's