Mortgage rates climbed again last week, and the housing market didn't crack so much as bend. Buyers haven't quit, but more of them are reaching for riskier loans to make the math work.
The average 30-year fixed mortgage rate climbed to 6.56% from 6.46% the week before, the highest reading in seven weeks, per the Mortgage Bankers Association (MBA). Even small jumps in rates change what buyers can afford, and the bump pushed nearly one in ten borrowers toward an adjustable-rate mortgage.
An ARM is a home loan whose rate is locked for a few years before it resets with the market. The trade is simple: a lower payment now, in exchange for the risk it jumps later.
The average rate on a 5-year ARM was 5.76% last week, about 80 basis points (0.80 percentage points) cheaper than a 30-year fixed. Rising rates make that gap look like a deal up front, even though many borrowers regret the choice once rates fall and ARM payments adjust higher.
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Total mortgage applications fell 2.3% from the prior week to a five-week low, with purchase applications down 4% and refis flat.
Both lines still beat year-ago levels, with purchases up 8% and refis up 35%.
Rates sat closer to 7% a year ago, which is why year-over-year numbers look stronger than week-over-week ones. The week-over-week jump came from rising inflation worries about fuel costs and growing concern over global public debt, per MBA economist Joel Kan, both of which pushed U.S. Treasury yields higher.
Mortgage rates track the 10-year Treasury yield (the U.S. government bond that sets the floor for most home-loan pricing), so when yields rise, mortgage rates follow within days.
Rates have kept climbing this week, hitting their highest level since July 2025, per Mortgage News Daily. The longer they keep climbing, the wider the gap stays between a 30-year fixed and a 5-year ARM, and the more borrowers will pick the riskier option.
The ARM share already sits near 10%, the highest since October 2025, and if it keeps rising, housing demand isn't dying so much as getting more fragile. For investors, that fragility shows up first in homebuilder stocks like D.R. Horton and Lennar, plus mortgage lenders like Rocket and UWM.
ARMs work great until they reset.
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