Moody’s has downgraded the long-term senior unsecured debt ratings of Fannie Mae and Freddie Mac to Aa1 from Aaa, following its May 16 downgrade of the U.S. government. The outlooks for both agencies were revised from negative to stable, signaling no immediate expectation of further downgrades — but acknowledging that their credit profiles are now explicitly tied to a weakened federal credit standing.
For mortgage professionals, the downgrade doesn’t change loan-level pricing or guidelines today. But it reinforces something originators already understand: the strength of the agency mortgage market is ultimately tied to the perceived strength of federal support behind it.
While Fannie and Freddie have operated under conservatorship since 2008, Moody’s reiterated that investors continue to benefit from “very strong U.S. government support” — even in the absence of an explicit guarantee. That support remains critical to investor appetite for agency MBS, pricing stability in the TBA market, and the consistent flow of capital into conforming originations.
Moody’s noted that both GSEs continue to play an outsized role in housing finance, guaranteeing an estimated 20–25% of newly originated single-family mortgages and holding roughly a quarter of outstanding single-family mortgage debt. Their importance isn’t in question. What’s changed is the federal government’s ability to stand behind them with a previously unquestioned Aaa rating.
A Broader Realignment of GSE Ratings
The downgrade didn’t stop at the big two. The Federal Home Loan Bank System and its 11 regional banks also saw their long-term ratings drop from Aaa to Aa1. However, in contrast to the sovereign and GSE downgrades, Moody’s improved the outlook for the FHLBs from negative to stable, citing strong asset quality, conservative capital management, and the system’s essential role in providing liquidity to depositories and mortgage lenders.
For IMBs and others relying on warehouse funding or liquidity through the FHLB system, the downgrade likely won’t change access today. But it may eventually influence how that funding is priced — especially if further pressure builds on the government’s credit rating or the structure of government support for GSEs evolves.
Not the First, Not Alone
Moody’s isn’t the first to take action. After Fitch downgraded the U.S. sovereign rating in August 2023, it quickly followed with downgrades to certain Fannie Mae and Freddie Mac CRT securities, citing their reliance on federal backing. And while S&P’s historic U.S. downgrade in 2011 didn’t directly affect GSE ratings, it introduced volatility to agency MBS spreads and highlighted how tightly intertwined the markets are.
The difference this time is that multiple rating agencies have now taken direct action on the GSEs themselves.
What Mortgage Professionals Should Watch
- TBA Execution: As investor perception of agency credit risk adjusts, we may see changes in demand or spreads that affect execution.
- CRT Market Volatility: The lower ratings may impact how some investors view agency credit risk exposure, especially in non-guaranteed tranches.
- Warehouse Liquidity: The FHLB downgrades, though modest, could eventually affect cost of funds for lenders using advances or relying on membership to strengthen their balance sheets.
- Policy Risk: Moody’s made clear that any amendment to the PSPAs or broader structural changes to conservatorship could affect credit ratings — and markets will be watching.
The Bottom Line
Fannie and Freddie are still functioning exactly as they were last week. But the sovereign downgrade — and the knock-on impact to the GSEs — sends a clear message: these entities don’t exist in a vacuum. As the government’s fiscal credibility evolves, so too does the perception of its ability to support the mortgage market’s most critical institutions.
