There’s nothing magic about 7%. The Journal itself notes the line doesn’t carry any special economic meaning; it matters because buyers think it does. But Freddie Mac’s average 30-year rate hit 7.03% this week, the first time above 7% since the start of 2025, and economists expect more would-be buyers to sit out a housing market now in a fourth straight year of sluggish sales. For the ones who can’t wait, the loans with the friendlier first payment are likely to look a lot more tempting.
It’s been a whiplash year. February brought the first sub-6% rates since 2022, and buyers stirred; then the Iran conflict rattled oil and trade, rates climbed and the spring market fizzled. Sellers are caught, too. The lock-in effect had been easing, with 1.62 million existing homes for sale in August, the most since 2019, but an owner sitting on a 3% loan may now remodel instead of listing. Builders, already squeezed by materials and labor costs, are leaning on rate buydowns that get costlier as rates rise.
What the smaller payment is betting on
An adjustable-rate mortgage locks a lower rate for an opening stretch, usually three to 10 years, then resets periodically to a market index plus a fixed margin, within caps set in the loan. That pays off if rates fall, and Brad Case, Homes.com’s chief residential economist, warns that’s a risky thing to assume. An interest-only loan shrinks the payment by skipping principal for a set period, so none of the balance gets paid down; if prices slip, the owner can end up owing more than the house is worth. “You have to know why the monthly payment is lower,” Case told the Journal, and he ranks both loans as riskier than a plain 30-year fixed. How big is the discount? Bankrate’s survey in Friday’s paper, a separate gauge from Freddie Mac’s, puts the average five-year ARM at 6.16%, less than a point below its own 30-year fixed average.
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Each loan makes a different bet. An ARM bets on rates; an interest-only loan bets on prices. Either can fit a buyer with a clear exit, like a planned sale or a payoff before the reset, and either can hurt a buyer who’s counting on the starter payment just to afford the house. The housing rule (M6) is to underwrite the loan at its worst plausible payment, not its first: ask the lender what the payment would be at the ARM’s rate caps, and what it becomes when an interest-only period ends and principal comes due over fewer years. If that number breaks the budget, the house is a stretch at today’s rates, whatever the first bill says.
If a builder offers to buy your rate down, ask whether the buydown is permanent or temporary; a temporary one lowers the payment only for the first few years, then steps it up. And don’t count on a quick refinance. The 10-year Treasury yield, which mortgage rates tend to follow, closed Friday at 5.17%, its highest close since 2007. Plan as if the refinance never comes. If it does, it’s a bonus.