Bank of New York Mellon Corp. has announced the purchase of Portsmouth Financial Systems, a developer of modeling and analytics for structured credit transactions, so that it can give clients and investors more transparency in structured credit portfolios.

Bank of New York Mellon said the purchase will let it offer clients and investors an opportunity to review actual or predicted security cash flows, to gain access to loan-level historical data analysis and cash-flow scenarios and to plug in default and prepayment modeling.

The service will initially focus on analysis related to U.S. residential mortgage-backed securities and will be expanded eventually to include other structured assets globally.

The deal price was not disclosed.

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