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Pool Prefix Glossary
Pool Prefix Glossary

Each mortgage loan pool -- and the related issue of guaranteed mortgage pass-through certificates -- is assigned a separate pool number and a two-character prefix that identifies the type of mortgage loans in that pool and the basic terms of the certificates.

The type of information reflected by the prefix includes whether the loans are conventional, government-insured, or guaranteed; whether they bear interest at a fixed rate or an adjustable rate; in the case of fixed-rate pools, the general term to maturity; and, in the case of adjustable-rate pools, various other features.

The pool prefixes are defined in the Pool Prefix Glossary.