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Oil prices surge higher as US and Iran exchange fire for first time in a month

AUGUST 31, 2026

News of the first direct exchange of fire between the US and Iranian militaries in roughly a month sent oil prices surging upward on Monday, with Brent futures rising above $90 per barrel as investors priced in renewed escalation.

Futures on Brent crude (BZ=F), the international benchmark, pushed to an intraday high above $91 per barrel, gaining over 2% to cross $90 for the first time in roughly a week. Meanwhile, those on US benchmark WTI crude (CL=F) gained roughly 4% to trade above $86.

Futures surged at the start of trading Sunday evening on news that the US military had launched a series of air strikes on Iran's Larak Island, a small landmass inside the Strait of Hormuz, where US Central Command alleges the Iranian military was readying rockets that would carry sea mines into the waterway.

Given Larak Island's location in the strait, it has become a crucial monitoring and traffic control point for Iran's Revolutionary Guard Corps.

"Earlier today U.S. forces struck two Iranian launchers on Larak Island. Islamic Revolutionary Guard Corps forces were observed preparing to launch rockets with sea mines into the Strait of Hormuz," a Central Command spokesperson said in a statement.

Iran's military retaliated with a barrage of drones targeting sites within GCC nations Jordan and the United Arab Emirates and said it had seized a bulk carrier vessel near the port of Bandar Abbas inside the Strait of Hormuz. Tehran's military leadership also claimed that an oil supertanker had struck a mine while attempting to transit an unauthorized route through the strait, though US Central Command said it had successfully demined the waterway in its statement on Sunday.

"Iran is officially a Failed Nation. IT IS DEAD!" President Trump wrote on social media Monday morning. "They have no Navy, they have no Air Force, they have no currency, they are not paying their soldiers or police, Inflation is at 300%, and their leadership is in total disarray and incapable of properly representing the country."

A pedestrian walks past a billboard depicting US President Donald Trump inside a catering container, installed on a building along a street in downtown of Tehran on August 31, 2026. Iran attacked US military targets in the Middle East on August 31 in retaliation for American strikes on an island in the Strait of Hormuz, the first exchange of fire for a month in a war that has engulfed the region. Six months into the conflict, the two sides remain at an impasse, with Iran keeping the strategic strait shut and Washington persisting with a naval counter-blockade of Iran. (Photo by ATTA KENARE / AFP via Getty Images) /
A pedestrian walks past a billboard depicting President Trump inside a catering container, installed on a building along a street in downtown Tehran on Aug. 31, 2026. (Atta Kenare/AFP via Getty Images) / · ATTA KENARE via Getty Images

The exchange of fire between the two nations underscores the perpetual stress that a war now in its sixth month continues to inject into the global economy.

Even as oil flows from the Persian Gulf have climbed to roughly two-thirds of their prewar levels, at around 15 million barrels per day, shortages of refined products like gasoline and diesel remain stretched, per research from Goldman Sachs. Attacks by Iran on refineries in the Middle East and, separately, by the Ukrainian military inside Russia — a key source of global refining capacity — have foisted elevated energy costs onto a range of businesses and consumers in both the US and abroad.

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