Fannie Mae’s New Crypto Mortgage Program Explained: The $200,000 Collateral Problem

On a recent episode of How to Money, co-host Joel Larsgaard summed up Fannie Mae’s new crypto-as-collateral mortgage program in five words: “This seems incredibly, it feels like a house of cards, man.” He owns crypto himself. He still thinks “it’s a bad idea for lenders to be doing this.”

Here is the program in plain terms. Fannie Mae will accept crypto and stablecoin assets as collateral for conventional mortgages, with Better as the first lender underwriting these loans starting in June. The catch: because of crypto’s volatility, the collateral value must be at least 250% of the down payment loan. You pledge Bitcoin instead of cash and borrow against it to cover your down payment. Larsgaard’s read: “This isn’t just evaluating your holdings. It’s also saying, hey, how about a zero-down loan? Your ability to not put anything down on this home based on the assets you have on hand, which is crazy.”

The stakes are simple. If your collateral tanks, you face a margin call on the same asset keeping you in your house. Get this wrong and you lose both the crypto and the home.

The verdict: skip it, and here is the math

Larsgaard is right. For an ordinary buyer, this product trades a one-time inconvenience (saving a cash down payment) for permanent solvency risk tied to one of the most volatile assets on earth. The 250% overcollateralization sounds conservative until you run it.

Take a $400,000 home with an $80,000 down payment financed through the crypto sleeve. To pledge that, you would need roughly roughly $200,000 in Bitcoin posted as collateral. Bitcoin trades around $77,401 today, so call it roughly two and a half coins.

Apply real recent price history. Bitcoin is down 28% over the past year and 12% year to date. Ethereum is off 29% year to date and 17% over the past year. A 60% drawdown from these levels is an ordinary occurrence for crypto. It has happened repeatedly. A 60% decline on $200,000 of pledged Bitcoin leaves $80,000 of collateral against an $80,000 loan. That is a margin call, and you cover it by selling crypto into a falling market, adding cash, or losing the position.

Larsgaard draws the right contrast with traditional securities-backed lending used by billionaires. Pledged Amazon (NASDAQ:AMZN | AMZN Price Prediction) shares are backed by “real estate that Amazon owns, factories, warehouses, equipment.” Crypto, in his words, has “no underlying actual value… other than just trust.” You cannot debate the volatility, which is the only thing the margin engine cares about.

The rate side does not save the deal either. The 10-year Treasury yield is almost 4.6%, a 12-month high and up sharply in the past month alone. Mortgage rates ride that benchmark. On these crypto-backed loans “rates could be higher than average and you might not get the best terms.” You are paying a premium rate to take on collateral risk a traditional lender would never accept.

The variable that flips the answer

The one factor determining whether this product is reasonable or reckless is what share of your net worth sits in crypto. Larsgaard’s standard is direct: “for most people listening, I think that that would indicate too much crypto, too much Bitcoin on hand” if you have 250% of a down payment ready to pledge.

Run it two ways. If a buyer has $200,000 in Bitcoin and that represents 80% of their liquid net worth, a 50% crypto drawdown is catastrophic. They cannot meet a margin call without selling, and selling locks in the loss while jeopardizing the loan. If a buyer has $200,000 in Bitcoin and that is 10% of liquid net worth, the math survives a drawdown because cash reserves can backstop the collateral. The product still costs more than a conventional mortgage, but it stops being a solvency event.

What to do instead

1. Shop conventional lenders first. Larsgaard’s advice: “it’s still worth shopping around” and check credit unions and traditional banks before any crypto-backed product.
2. If you must tap crypto for a down payment, sell the portion you need, pay the capital gains tax, and put cash down. You convert the volatility risk into a one-time tax bill rather than an ongoing margin liability.
3. Stress-test your own pledge. Take your crypto holdings, cut them by 50% and by 70%, and ask whether you could still cover the loan, the mortgage, and a month of expenses. If the answer is no at either threshold, the product is not for you.
4. Consider the macro backdrop. University of Michigan consumer sentiment is at 53.3, well into pessimistic territory, and rate-sensitive borrowers are already stretched. Layering crypto collateral on top of a high-rate mortgage compounds existing risks.

The existence of an option is not an argument for using it. Pledge crypto only if you can afford to lose it without losing the house.