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The average 30-year fixed mortgage rate climbed to its highest level in seven weeks as bond yields jumped amid mounting inflation concerns and rising geopolitical tensions.
The rate rose to 6.56% for the week ending May 15, up 10 basis points from 6.46% the previous week, according to the Mortgage Bankers Association’s Weekly Mortgage Applications Survey. The increase marked the fourth consecutive week of higher rates.
“Ongoing concerns around inflation from higher fuel costs, combined with rising concerns over global public debt, pushed Treasury yields higher in the US and abroad last week,” said Joel Kan, MBA’s Vice President and Deputy Chief Economist. “This resulted in higher mortgage rates across the board, with the 30-year fixed rate increasing to 6.56%, its highest level in seven weeks.”
ARM Share Jumps to Highest Since October
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As fixed-rate borrowing costs climbed, a growing share of buyers turned to adjustable-rate mortgages. ARM applications accounted for 9.6% of all loan applications, the highest proportion since October 2025. ARM rates ran roughly 80 basis points below the 30-year fixed, making the shorter-term product increasingly attractive to rate-conscious borrowers.
The average 5/1 ARM came in at 5.76% for the week, a spread wide enough to shift borrower calculus meaningfully toward the adjustable structure.
Applications Slip as Borrowers Pull Back
Total mortgage application volume fell 2.3% on a seasonally adjusted basis, reversing a 1.7% rise the prior week. Purchase applications slid 4%, their sharpest weekly decline in over a month. Refinance applications were essentially flat, slipping just 0.1% from the previous week while remaining 35% above year-ago levels.
“Overall applications were down to the lowest level in five weeks as purchase borrowers pulled back across conventional and government loan types,” Kan added.
Bond Market, Not Fed, Drives the Move
The rate increase was driven by the bond market, not the Federal Reserve. The 10-year Treasury yield climbed from 4.42% on May 15 to an intraday peak of 4.68% before settling near 4.61%, breaching a technical level that had held since late April. More strikingly, the 30-year Treasury yield hit 5.20% — its highest level since July 2007 — as investors demanded greater compensation for long-term inflation and sovereign debt risks.
Financial markets are no longer pricing in any Fed rate cuts for the remainder of 2026 and have begun factoring in the possibility of an increase if energy-driven inflation continues to broaden into core categories.
Outlook: Rates Likely to Remain Elevated
Mortgage rates, which track the 10-year Treasury yield far more closely than the Fed’s short-term policy rate, are likely to remain sensitive to every new inflation reading and every development in the geopolitical backdrop that continues to drive oil prices higher. With Iran tensions persisting and oil prices elevated, the path toward lower borrowing costs appears increasingly uncertain for prospective homebuyers.
