U.S. mortgage rates climb as Iran war lifts inflation fears
U.S. homebuyers expecting borrowing relief in 2026 are instead facing a renewed rise in financing costs. Since the war in Iran began in late February, mortgage rates have moved sharply higher, pushing the average 30-year fixed rate to its highest level since July 2025.
Highlights
- U.S. 30-year fixed mortgage rates climb to 6.71% as of Sept. 3, up 73 basis points since late February amid Iran war and inflation concerns.
- Higher mortgage rates intensify affordability pressures, delaying relief for homebuyers that analysts had anticipated for 2026.
- 15-year fixed mortgage rates also surge, reaching 6.04%, marking the highest level since February 2025.
Rate increases tied to war and inflation outlook
As reported by Bloomberg, mortgage rates are rising as the war in Iran and concerns about higher inflation expectations unsettle the outlook for U.S. borrowers.As of Sept. 3, rates have climbed 73 basis points since the conflict began in late February. The national average rate on a 30-year fixed mortgage rises to 6.71%, the highest level since July 2025, according to Freddie Mac.
Housing affordability pressure builds
The move higher adds fresh strain to the housing market after 2026 had been expected to bring some relief for sidelined buyers. Higher mortgage costs typically reduce affordability and make it harder for households to re-enter the market.Rates on 15-year fixed mortgages are following a similar path. The average reaches 6.04%, a level not seen since February 2025.
Our earlier report on upcoming U.S. inflation readings and the Fed’s September rate decision explained how producer prices and the Sept. 11 CPI were set to become the key test for whether policymakers stay on hold or deliver another hike. We also noted that markets were reacting quickly to shifting rate expectations, with moves in Treasury yields and equities reflecting how sensitive investors are to any change in the inflation outlook.
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