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Why crude oil prices fell sharply after the US-Iran agreement announcement

A breakthrough between Washington and Tehran triggered a broad market reaction, with crude prices declining and major Asian stock indices posting gains.

By Trisha Katyayan

Jun 15, 2026 12:37 IST

Global oil prices fell sharply on Monday after the United States and Iran reached an agreement aimed at ending months of conflict in West Asia and reopening the strategically important Strait of Hormuz.

The development eased fears of prolonged disruptions to global energy supplies and triggered a broad market reaction. According to Reuters, US crude futures for July delivery dropped nearly 5 per cent to around $80.83 per barrel, while Brent crude fell about 4 per cent to $83.77 per barrel.

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The decline came as traders reassessed geopolitical risks following announcements from US President Donald Trump and Pakistan Prime Minister Shehbaz Sharif confirming that Washington and Tehran had agreed to an immediate and permanent halt to military operations.



Strait of Hormuz reopening in focus

In a post on Truth Social, Trump said the agreement would pave the way for the toll-free reopening of the Strait of Hormuz and the removal of the US naval blockade on Iran.

He further stated that the crucial shipping route would officially reopen on Friday, when a formal peace agreement is expected to be signed in Switzerland.

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The Strait of Hormuz is one of the world's most important energy corridors and plays a critical role in global oil and gas transportation. Any disruption in the passage has historically raised concerns about supply shortages and higher energy costs.



Asian stock markets rally

The easing of tensions also lifted investor sentiment across Asia.

South Korea's Kospi index surged more than 5 per cent, while Japan's Nikkei 225 advanced 3.6 per cent. Australia's S&P/ASX 200 also posted gains, rising 1.3 per cent during trading.

The positive market response reflected expectations that a reduction in regional tensions could help stabilise energy supplies and improve global economic confidence.

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Conflict had raised energy market fears

The conflict began in late February following US-Israeli strikes on Iran and later expanded across the region, including Lebanon.

As tensions escalated, concerns grew over the security of shipping routes in the Gulf and the potential impact on global oil flows. The reported breakthrough between Washington and Tehran has now raised hopes that those concerns could begin to ease, with markets closely watching developments ahead of the planned peace agreement signing later this week.

FAQs:

Why did oil prices fall on Monday?

Oil prices declined after the US and Iran reached an agreement that eased concerns over disruptions to global energy supplies.

What role does the Strait of Hormuz play in global energy markets?

The Strait of Hormuz is a critical shipping route for oil and gas, making it one of the world's most important energy corridors.

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