The traditional pool-reliant and often manual methods used to price and manage mortgage-backed securities portfolios are gone with the winds of the economic storm, leaving a future strategy reliant on deep dives that measure rapidly changing individual borrower data.

"Institutions may have been more comfortable with aggregated information for the assets underlying the MBS," says John Jay, a senior analyst for Aite Group. "But if institutions can get a handle on loan-level information, they will be better off."

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