Fannie Mae and Freddie Mac, the twin pillars propping up the American housing market, are running hotter on interest-rate risk. For two institutions whose combined mortgage-backed securities and debt exposure exceeds $5 trillion, that’s not a rounding error.

The government-sponsored enterprises have been under federal conservatorship since the 2008 financial crisis. During that time, they’ve generally kept interest-rate risk in check through derivatives hedging and careful portfolio management.

What’s actually happening with the GSEs

Fannie Mae’s most recent quarterly report maintained that its derivatives hedging strategy kept interest-rate risk exposure “consistently low” despite volatile market conditions. With mortgage rates currently sitting around 6.30%, the GSEs are navigating a tricky environment where rate movements in either direction create asymmetric exposure.

If rates spike, their existing portfolio loses value. If rates drop, borrowers refinance and the GSEs lose their higher-yielding assets.

The crypto wrinkle nobody expected

On June 25, 2025, FHFA Director Bill Pulte issued a directive requiring both GSEs to propose measures for recognizing verified cryptocurrency holdings on regulated exchanges as qualifying reserves for mortgage borrowers.

Fannie Mae took it a step further. The enterprise approved its first crypto-backed mortgage product, developed in partnership with Better Home & Finance and Coinbase. The product allows borrowers to use Bitcoin or USDC as collateral without converting their digital assets to dollars first.

Blockchain-based mortgage lender Figure has announced plans to compete directly with Fannie and Freddie, claiming it can significantly reduce mortgage origination costs through on-chain processes.

What this means for investors

For crypto market participants, the GSEs’ embrace of digital assets as mortgage collateral represents a legitimacy milestone. When the entities that backstop the majority of American mortgages start treating Bitcoin as valid reserves, it creates a precedent that ripples across all of traditional finance.

Homeowners who hold crypto won’t need to trigger taxable events by selling their positions to qualify for mortgages. That removes a major friction point that has historically forced crypto holders to choose between their digital asset positions and homeownership.

Fannie and Freddie are layering crypto collateral risk on top of already-elevated interest-rate risk. In a scenario where rates spike sharply, crypto markets have historically sold off simultaneously as investors flee risk assets. A mortgage backed by Bitcoin collateral in a rising-rate environment could see both the borrower’s ability to pay and the collateral value deteriorate at the same time.

The key variable to monitor is how the FHFA structures its oversight of crypto-collateralized products. The directive from Pulte opened the door, but the guardrails around loan-to-value ratios, liquidation protocols, and which assets qualify will determine whether this innovation strengthens or destabilizes the housing finance system.