Credit Suisse is issuing its fifth residential mortgage-backed securitization of 2013, worth $407.123 million, according to a report from Standard and Poor’s.

S&P assigned ratings to the deal called CSMC Trust 2013-IVR4.

There are 75 classes totaling $376.588 million rated 'AAA'. One class totaling $5.7 million rated 'AA'. Two classes totaling $13.638 million rated 'BBB'. And two unrated subordinate classes totaling $11.197 million.

The transaction structure and ratings given were in line with the three prior CSMC Trust-IVR transactions issued this year.

The ratings indicate S&P’s positive view of the pool's high-quality collateral, the transaction's credit enhancement, and DLJ Mortgage Capital Inc.'s flow acquisition program, the report said.

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