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Ships and boats in the Strait of Hormuz

Ships and boats in the Strait of Hormuz, Musandam, Oman, April 22, 2026. REUTERS/Stringer/File Photo Purchase Licensing Rights, opens new tab

BEIJING, June 18 (Reuters) - Oil prices fell in early trading on Thursday after the U.S. and Iran signed an interim agreement that would end the Iran ​war, reopen the Strait of Hormuz and waive U.S. sanctions on ‌Tehran's oil, resolving the largest energy supply disruption in history.

Brent crude futures were down 89 cents, or 1.12%, at $78.66 a barrel as of 0005 GMT, and U.S. West Texas Intermediate ​fell 98 cents, or 1.28%, to $75.81 a barrel.

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The benchmarks resumed their decline, ​reversing gains made on Wednesday after U.S. President Donald Trump said ⁠he could resume his bombing campaign if Iran's leaders "don't behave".

"The sell-off extended as ​energy markets continued to aggressively price in a faster-than-expected return of Iranian barrels ​following the recent U.S.-Iran memorandum of understanding," IG market analyst Tony Sycamore said in a note.

The 14-point memorandum begins a 60-day negotiation period during which Iran will allow toll-free passage through the ​Strait of Hormuz, a key oil and gas shipping lane. The deal ​calls for traffic through the strait to be restored to its full capacity within 30 days.

The ‌preliminary ⁠accord defers many of the more difficult issues such as Iran's nuclear program, and also requires the U.S. and its partners to come up with a $300 billion plan to finance Iran's recovery.

If the agreement is successfully implemented and the strait ​reopened, this year's ​supply crisis could ⁠turn into a significant supply glut in 2027, the IEA cautioned on Wednesday, forecasting in its monthly market report that supply ​will outstrip demand by 5.05 million barrels per day next ​year as ⁠Middle East oil returns to the market.

The U.S. Federal Reserve is also increasingly weighing whether it will need to raise interest rates later this year to rein in ⁠inflation, which ​could slow economic growth and suppress oil demand.

Nine ​of 19 Fed policymakers now think a rate hike will be needed, Wednesday projections showed, a departure ​from three months ago when none of them held that view.

Reporting by Colleen Howe

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