Washington Stirs the Pot Again…Mortgage Rates Climb to 15-Month High

Just when it appeared tensions in the Persian Gulf might finally be cooling, Washington stirred the pot again.

Fighting between the U.S. and Iran intensified this week, quickly sending oil prices higher…and once again, the bond and mortgage markets followed.

We’ve seen this movie before.

Whenever conflict escalates in the Middle East, financial markets immediately begin calculating the potential impact on the global oil supply. It doesn’t necessarily take an actual shortage to move prices. The possibility of disrupted production, shipping lanes or exports is often enough for traders to build a geopolitical “risk premium” into the price of a barrel of oil.

And that matters far beyond what we pay at the gas pump….Oil is woven throughout the economy. Higher energy prices increase transportation, manufacturing, shipping, and distribution costs. Airlines pay more for fuel. Trucking companies pay more for diesel. Manufacturers pay more to produce and transport goods. Eventually, some of those increased costs find their way to consumers.

In other words: higher oil prices can mean higher inflation…and inflation remains the bond market’s biggest enemy. When investors believe inflation may remain elevated, they typically demand higher yields to own longer-term bonds. That puts upward pressure on the 10-year Treasury yield, which is one of the most important benchmarks influencing mortgage rates.

The chain reaction looks something like this:

Persian Gulf tensions → higher oil prices → greater inflation concerns → higherTreasury yields → higher mortgage rates.

Unfortunately, that chain reaction is playing out again. The average top-tier 30-year fixed mortgage has climbed to approximately 6.89%, its highest level since June 2025. We haven’t quite reached the June 2025 peak of roughly 6.97%, but we are getting uncomfortably close to seeing a “7” in front of mortgage rates again.

Perhaps the most frustrating part for homebuyers is that this latest move has very little to do with housing. Home prices didn’t suddenly surge. Mortgage demand didn’t suddenly explode. And the U.S. economy didn’t suddenly change overnight.

Instead, mortgage rates are once again being influenced by events occurring thousands of miles away. That’s also why predicting where rates go from here is particularly difficult. A cooling of tensions and a retreat in oil prices could quickly provide some relief to bonds and mortgage rates. Additional escalation, however, could push oil higher and keep inflation fears…and mortgage rates…elevated.

For buyers waiting for the “perfect” interest rate before purchasing a home, this is another reminder that the road to lower mortgage rates was never going to be a straight line.

For now, keep one eye on the 10-year Treasury…and the other on the Persian Gulf.