If you're wondering why mortgage rates went up this week, it comes down to three headlines you might've seen over the weekend.

  • Iran and US exchange fire (minelaying, then strikes)
  • Ukraine hit Russia's second largest refinery
  • US announces 55% stake in a Venezuelan oil venture

Let's break down what actually moved rates, and what didn't.

Iran Has the Biggest Effect on Oil Prices

The war in Iran has the biggest effect on oil prices. That's what moved crude Monday, not the strikes themselves so much as the mines. That's because mines are what actually close the Strait of Hormuz.

Russia's Refinery Problem

The refinery campaign, 20+ strikes across August, already pushed Russia to extend its diesel export ban. Less refining means less diesel and gasoline (prices up) and Russian crude with nowhere to go (crude prices slightly down).

Why the Venezuela Deal Doesn't Move the Needle

Venezuela produces about 1% of global output. The fields in this deal are mostly undeveloped, which puts meaningful production years away, if it happens at all.

We'll have to see how the deal shapes out and how it's executed. But US ownership doesn't change the math much either way, since oil sells at global prices regardless of whose name is on it.

Where Rates Stand Right Now

  • 10 year treasury: 4.762 (highest since Jan 2025. Lower is better)
  • 30YR UMBS 5.5: 98.94 (lowest since July 2025. Higher is better)
  • 30 year conventional rate at 6.81% average (Mortgage News Daily. Highest since July 2025)

Rates ticked up because of the oil and geopolitical picture above, not because of anything happening in the mortgage market itself.

If you want to see how a move like this actually affects your monthly payment, run your numbers through the payment and closing cost calculator. And if you're trying to figure out what all this means for your specific situation, grab a free planning session and we'll walk through it together.

Sam

Originally shared by u/SamTMortgageBroker in r/NewbHomebuyer — view the original thread.