KBRA assigns preliminary ratings to six classes of mortgage pass-through notes from CSMC 2022-ATH1 Trust (CSMC 2022-ATH1), a $251.5 million non-prime RMBS transaction. The underlying collateral, comprising 616 residential mortgages, is characterized by a significant concentration of loans underwritten using alternative income documentation. Borrowers in the subject pool possess a non-zero WA original credit score of 729 and exhibit substantial equity in each mortgaged property, with weighted average (WA) original loan-to-value (LTV) and combined LTV (CLTV) ratios both equaling 67.6%.

KBRA’s rating approach incorporated loan-level analysis of the mortgage pool through its KBRA RMBS Credit Model, an examination of the results from third-party loan file due diligence, cash flow modeling analysis of the transaction’s payment structure, reviews of key transaction parties and an assessment of the transaction’s legal structure and documentation. This analysis is further described in our U.S. RMBS Rating Methodology.

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Related Publications

• CSMC 2022-ATH1 Trust Tear Sheet
• RMBS KBRA Comparative Analytic Tool (KCAT)
• U.S. RMBS Rating Methodology
• U.S. RMBS Mortgage Default and Loss Model Methodology
• Global Structured Finance Counterparty Methodology
• ESG Global Rating Methodology

Disclosures

Further information on key credit considerations, sensitivity analyses that consider what factors can affect these credit ratings and how they could lead to an upgrade or a downgrade, and ESG factors (where they are a key driver behind the change to the credit rating or rating outlook) can be found in the full rating report referenced above.

A description of all substantially material sources that were used to prepare the credit rating and information on the methodology(ies) (inclusive of any material models and sensitivity analyses of the relevant key rating assumptions, as applicable) used in determining the credit rating is available in the Information Disclosure Form(s) located here.

Information on the meaning of each rating category can be located here.

Further disclosures relating to this rating action are available in the Information Disclosure Form(s) referenced above. Additional information regarding KBRA policies, methodologies, rating scales and disclosures are available at www.kbra.com.

About KBRA

Kroll Bond Rating Agency, LLC (KBRA) is a full-service credit rating agency registered with the U.S. Securities and Exchange Commission as an NRSRO. Kroll Bond Rating Agency Europe Limited is registered as a CRA with the European Securities and Markets Authority. Kroll Bond Rating Agency UK Limited is registered as a CRA with the UK Financial Conduct Authority pursuant to the Temporary Registration Regime. In addition, KBRA is designated as a designated rating organization by the Ontario Securities Commission for issuers of asset-backed securities to file a short form prospectus or shelf prospectus. KBRA is also recognized by the National Association of Insurance Commissioners as a Credit Rating Provider.

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