Oil falls to 3-month low as US-Iran deal shifts inflation outlook

A framework peace agreement between the Trump administration and Iran sent crude oil to a three-month low Friday, with Brent settling near $80 a barrel and WTI at $77.54, as traders priced in the potential return of Iranian supply to global markets and a de-escalation of the conflict that has reshaped energy trade through the Strait of Hormuz.

"The agreement removes a significant geopolitical risk premium that had been embedded in oil prices since late February," said Mark Cancian, a senior adviser at the Center for Strategic and International Studies. "The question now is how quickly Iranian barrels can re-enter the market and whether the ceasefire in Lebanon holds."

Brent crude fell from war-time highs above $100 a barrel to settle around $80 on Friday, while WTI closed at $77.54, according to market data. The decline has already translated into lower costs at the pump: a gallon of regular gasoline averaged $3.94 on Sunday, down almost 14% from a month ago, according to AAA. That remains nearly a dollar more expensive than before the war began, but the trajectory is shifting. The Iran war has cost the Pentagon about $40 billion, according to preliminary CSIS estimates, while American households have spent more than $253 extra on energy compared with a no-war scenario, per Brown University data. Annual inflation climbed above 4% for the first time in three years, driven by energy prices, the Bureau of Labor Statistics reported.

The 14-point memorandum of understanding signed last week in Islamabad triggered a 60-day negotiation period covering the war in Lebanon, the Strait of Hormuz and Iran's nuclear program. A key provision — Clause 13 — grants Iran a temporary exemption from US sanctions on oil and oil derivatives, with a draft agreement already finalized, according to Hossein Ghorbanzadeh, an economy expert on the Iranian delegation. Iran's finance minister, Seyed Ali Madanizadeh, said the accord would allow the country to sell crude without restrictions, boosting foreign exchange earnings to address the budget deficit. The world lost 1.15 billion barrels of oil supply during the war, according to Kpler, and the Strait of Hormuz — which previously handled 20 million barrels a day — was effectively blockaded for nearly four months.

Strait of Hormuz remains a flashpoint

Even as oil prices fell, the situation around the Strait of Hormuz remains volatile. Iran said Saturday it would close the vital waterway again in response to Israeli strikes in Lebanon, though US Energy Secretary Chris Wright said 67 ships carrying oil passed through in the last 24 hours, roughly equal to pre-conflict traffic. "Traffic is flowing through the straits quite nicely," Wright told Fox News, adding that the US has opened a separate route to the south and has been escorting ships through it. The head of the Iranian National Oil Company, Hamid Bovard, said more than 25 million barrels of Iranian oil have passed through the virtual blockade line since Monday.

President Donald Trump threatened Sunday to "take over" the strait if a deal is not reached, telling Fox News the US would "collect tolls" and warning the Iranian delegation in Switzerland they "won't even make it back to your f**king country" if the waterway remains closed. Iran's chief negotiator, Mohammad Bagher Ghalibaf, dismissed the threats, posting on X that "our armed forces are ready to give them a response in a different way." Negotiations in Switzerland stalled after Trump's comments but are not over, an Iranian source told CNN, with back-channel dialogues ongoing.

What the deal means for inflation and consumers

The decline in oil prices is the most direct channel through which the US-Iran agreement affects American households. Energy costs were the primary driver pushing annual inflation above 4% for the first time in three years, and prices were rising faster than the average American paycheck grew over the past year — the first time that had happened since 2023, according to BLS data. If diplomatic efforts succeed and shipping in the Strait of Hormuz returns to pre-war levels, a "flood" of oil could enter markets and continue to lower costs, said Karen Young, a researcher at Columbia University's Center on Global Energy Policy. However, Young cautioned that global economies have already begun weighing energy options beyond the Middle East, and the volatility from the Iran war has altered the energy market irreversibly, with Gulf neighbors investing in pipelines to avoid the strait entirely.

The next 60 days will determine whether the framework translates into a lasting peace. Technical negotiations resumed Sunday in Switzerland, with Vice President JD Vance saying the US is willing to "fundamentally transform" its relations with Iran. For consumers, the stakes are clear: every dollar drop in crude prices translates into roughly 2.4 cents at the pump, according to AAA, meaning a sustained move below $75 a barrel could bring gasoline back toward $3.50 a gallon — a level not seen since before the war began.

This article is for informational purposes only and does not constitute investment advice.