Credit Suisse (CS) issued $407 million of private-label residential mortgage-backed securities, according to Standard & Poor’s.

The credit ratings agency assigned top ratings to the majority of the bonds tranches, citing the high-quality collateral of the pool, S&P noted in a statement.

The platform, CSMC Trust 2013-IVR4, included Invesco Mortgage Capital, which held junior-ranking portions of the deal.

S&P revised various aspects of the transaction, including the servicer list, guidelines for cash flow assumptions and mortgage originator reviews.