What Oil Prices, Iran, and Your Mortgage Rate Have in Common

Every now and then the global economy reminds us that everything is connected. This week is one of those moments.

Geopolitical tensions involving Iran pushed oil prices higher, markets reacted quickly, and—almost immediately—interest rates started creeping upward again after several weeks of improvement. If that feels like a confusing chain of events, you’re not alone. But there’s actually a fairly logical link between oil prices and mortgage rates.

And yes, unfortunately it means what happens in the Strait of Hormuz can eventually affect what happens to your monthly mortgage payment in Tacoma.

Let’s unpack it.

Oil isn’t just another commodity. It’s more like the fuel (literally and economically) that powers large parts of the global economy.

When oil prices rise sharply, transportation costs increase. Shipping becomes more expensive. Airlines pay more for fuel. Delivery trucks, construction equipment, and manufacturing plants all start spending more money to operate.

Eventually, businesses pass those higher costs along to consumers. That’s how rising oil prices can feed into higher inflation.

Even relatively small oil spikes can push inflation expectations higher. And inflation expectations are one of the biggest drivers of long-term interest rates.

In other words: when energy prices go up, bond investors start getting a little twitchy.

Mortgage rates don’t come directly from the Federal Reserve. They’re primarily influenced by the bond market—especially the yield on the 10-year Treasury.

When investors believe inflation might stick around longer than expected, they demand higher yields on bonds to compensate for losing purchasing power over time.

Higher Treasury yields = higher mortgage rates.

That’s exactly what we saw this week. After drifting downward for several weeks, mortgage rates corrected slightly upward as markets digested rising oil prices and renewed geopolitical risk.

It’s a good reminder that mortgage rates are influenced by more than just domestic economic data. Jobs reports, inflation numbers, global conflicts, energy markets, and investor sentiment all play a role.

Basically, the mortgage market is a little like a weather system—lots of moving pressure fronts.

Much of the concern in oil markets centers around the Strait of Hormuz, a narrow shipping route between Iran and Oman that handles roughly 20% of the world’s oil supply.

Whenever tensions rise in that region, markets immediately start pricing in the possibility of supply disruptions.

Even if nothing actually happens.

Energy traders are famously cautious (or paranoid, depending on your perspective). If there’s even a small chance supply could tighten, oil prices often rise quickly.

And when oil prices rise quickly, inflation concerns follow close behind.

Cue higher bond yields and a nudge upward in mortgage rates.

The good news is that geopolitical-driven rate movements are often temporary. Markets tend to stabilize once more clarity emerges.

Short-term volatility doesn’t necessarily change the broader trend.

If inflation continues gradually cooling over the course of 2026, mortgage rates could still move lower overall—even if we experience occasional bumps like the one we’re seeing this week.

Think of it less like a straight downhill ski slope and more like a hiking trail: generally heading down, but with a few uphill stretches along the way.

• The cost of borrowing money isn’t determined by just one thing. It’s influenced by a surprisingly wide range of factors—including global energy markets and geopolitical tensions thousands of miles away.

And while we can’t control global geopolitics, we can stay informed—and make smart decisions when opportunities appear.