In Monterey Park, California, a ‘for sale’ sign is seen outside a house on September 17, 2025, marking a challenging period for homebuyers. Currently, the average 30-year fixed-rate mortgage has reached 6.66%, as reported by Freddie Mac, the Federal Home Loan Mortgage Corp. This is the highest rate in a year, with the previous peak at 6.72% in late July. This increase signals a decline in housing affordability.
Last summer, mortgage rates were decreasing, with hopes growing as rates fell below 6% in February 2026. This raised expectations of a revitalized housing market, encouraging hesitant home seekers and those accustomed to lower pandemic-era rates. However, geopolitical events disrupted these expectations. The conflict with Iran and the closure of the Strait of Hormuz led to a spike in oil prices, impacting shipping costs and ultimately raising the 10-year Treasury note yield, which influences mortgage rates.
“Oil prices always swing mortgage rates,” stated Kara Ng, a senior economist at Zillow. “Every gas pump reflects the impact on potential home buying.”
The average price for regular gasoline reached $4.10 per gallon, $1.11 higher than before the conflict. Housing expert Kate Wood from NerdWallet explained how the ongoing and intermittent nature of the Iran conflict has stirred investor concerns. “We’re looking for a definitive end to tensions in Iran,” she noted. However, she added that even a resolution might not fully ease market anxieties: “The market is wary of uncertainties.”
Investor apprehension extends to domestic economic policy as well. The Federal Reserve recently hinted at a potential interest rate increase in September, despite maintaining the current rate. Although the central bank’s rate-setting committee is divided, with three members supporting an increase, this division suggests a rise might be imminent.
The high cost of homes compounds the sluggish housing market. According to the National Association of Realtors, home sales over the past three years have stagnated. In June, the average existing home was priced over $440,000, while sales dropped 2.4% from the previous year, underscoring affordability challenges for many potential buyers.

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