Bond Education | Glossary
Pool Number
A unique six-character identifying number for every MBS pass-through (pool). Pool numbers, assigned by the issuing agency, are the most commonly used identifier for pass-throughs. Freddie Mac pool numbers may be specified with a hyphen between the pool prefix (the first two characters), which identify the type of loan collateral in the pool and the rest of the pool number (e.g., ?C5-1234? or ?C51234?).