Freddie Mac Giant MBS
Freddie Mac Giant MBS securities are single-class resecuritizations of Freddie Mac mortgage-backed securities (MBS), which are 55-day non-TBA-eligible securities.
Each Freddie Mac Giant MBS security is issued and guaranteed by Freddie Mac. Freddie Mac Giant MBS can be backed by any Freddie Mac 55-day fixed-rate MBS or Giant MBS.
Freddie Mac Giant MBS are pass-through securities, each representing an undivided interest in a pool of residential mortgages.
Freddie Mac offers traditional 30-year fixed-rate Freddie Mac Giant MBS in addition to 20-year and 15-year securities.
Formation Guidelines
- Dealers can form Supers on behalf of their customers using Freddie Mac Dealer Direct®.
- Reference the collateral prefix eligibility chart and pooling requirements:
- Newly formed 55-day fixed-rate MBS pools are eligible for Giant MBS the same day they are settled with the exception of the last business day of the month.
- Previously formed 55-day MBS and Giant MBS are eligible collateral for new 55-day Giant MBS.
- If Giant MBS collateral requires a 45-day to 55-day exchange, additional time is required to allow for the exchange settlement prior to the Giant MBS settlement. The exchange will be retired as of December 18, 2026. Learn more about Gold PC Exchanges.
For assistance with the execution of a Giant MBS transaction, email [email protected].
Freddie Mac Dealer Direct®
Authorized Giant, Supers and REMIC dealers can request trades and pricing, modify details, and upload information.
This product overview is not an offer to sell or solicitation of an offer to buy any Freddie Mac securities. Offers for any given security are made only through applicable offering circulars and related supplements, which incorporate Freddie Mac’s Information Statement and related supplements.