The cost of a 30-year fixed-rate mortgage in the United States has climbed to its highest level in nearly a year, as the collapse of a ceasefire between the U.S. and Iran reignites fears of energy-driven inflation and pushes Treasury yields higher. For the week ending July 16, the average rate reached 6.55%, up from 6.49% the prior week and the highest since August 2025, according to Freddie Mac.
The move marks a sharp reversal from the sub-6% rates seen just before the war began in late February. A preliminary ceasefire deal signed last month had briefly pulled rates lower, but the resumption of hostilities this week erased those gains. By Monday, the daily index had spiked to the wartime high of 6.75% before settling at 6.68% on Thursday, per Mortgage News Daily.
The transmission mechanism is straightforward. Mortgage rates are directly tied to the 10-year Treasury note yield, which itself is sensitive to inflation expectations and geopolitical risk. The renewed fighting has pushed oil prices higher on fears that the Strait of Hormuz—a chokepoint for a fifth of global oil trade—could be disrupted. Higher energy costs feed into broader inflation concerns, which in turn push bond yields up as investors demand greater compensation for holding fixed-income assets.