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Oil prices slide about 2% as US, Iran explore path out of war - Finance news and analysis from Global Banking & Finance Review
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Oil prices slide about 2% as US, Iran explore path out of war

Published by Global Banking & Finance Review

Posted on September 25, 2026

4 min read

· Last updated: September 25, 2026

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Oil Prices Drop 2% as US-Iran Seek Truce and Diesel Export Ban Looms

By Scott DiSavino

Market Reactions and Geopolitical Developments Impacting Oil Prices

NEW YORK, Sept 25 (Reuters) - Oil prices fell about 2% on Friday on mounting hopes for a truce between the US and Iran and talk about a possible US ban on diesel exports, even as traders worried that increasing attacks against Saudi Arabia by Houthi fighters could disrupt supply from the Middle Eastern producer. 

Oil Price Movements

Brent futures fell $2.28, or 2.1%, to settle at $104.32 a barrel. West Texas Intermediate (WTI) crude fell $2.20, or 2.3%, to settle at $92.41.

That put Brent up less than 1% for the week and WTI down about 8%.

US-Iran Negotiations and the Strait of Hormuz

US and Iranian negotiators in New York are exploring a phased path out of war that would involve Tehran reopening the Strait of Hormuz and Washington lifting its economic blockade of Iran, sources close to the talks said.

Iran's Stance on Nuclear Program

Iran, however, said it will show no flexibility over its nuclear program even if the US accepts its proposal to reopen the Strait of Hormuz, which calls for steps including lifting a US naval blockade on Iranian ports, a senior Iranian official told Reuters on Friday.

Diesel Export Ban and Market Implications

"The complex is again coming under pressure ... as the market continues to assess the possibility of a (US) diesel export ban while talk of diplomatic progress toward opening the Strait of Hormuz is adding to today’s selling," analysts at energy advisory firm Ritterbusch and Associates said in a note.

Washington's talk of a possible ban on diesel exports is widening the gap between US crude oil futures and the global Brent benchmark, a signal that markets expect US refiners to process less crude oil if their diesel output gets stuck at home.

The premium of Brent crude over WTI rose to its highest since May for a third day in a row, while US gasoline futures fell around 4% on Friday.

Regional Security and Oil Supply Risks

Help for Saudi Arabia

Saudi, Turkish and Pakistani military chiefs are to discuss help for Saudi Arabia as it faces attacks by Yemen's Iran-aligned Houthis.

Houthi Attacks and Oil Flows

The Houthis have launched strikes on the Saudi-backed government in Yemen and repeatedly fired into Saudi Arabia, disrupting oil flows from the world's largest energy exporter, part of a wider Middle East war that began with US and Israeli strikes on Iran on February 28.

Crude oil flows out of the Strait of Hormuz reached 33.7 million barrels in the week starting September 20, preliminary ship-tracking data from Kpler showed on Friday, putting exports roughly on track with the previous week's levels.

Before the start of the Iran war, about 20% of the world's oil supplies moved through the strait.

US-China Relations and Energy Demand

Separately, US President Donald Trump made clear during talks with Chinese President Xi Jinping that Chinese help for Iran is unacceptable, US Ambassador to China David Perdue said on Friday.

Any agreements to reduce trade tensions between the US and China could boost economic growth and demand for energy.

Russian and Ukraine Conflict

Diplomatic Efforts and Energy Impact

The US has proposed that the United Arab Emirates host a trilateral meeting with Ukraine and Russia to discuss efforts to end their 4-1/2-year-long war, Ukrainian President Volodymyr Zelenskiy said.

Russian President Vladimir Putin said all proposals for a settlement in the 4-1/2-year-old war with Ukraine remained on the table, but Moscow still needed to assess what was in its best interest, Russian news agencies reported.

Drone Attacks and Oil Infrastructure

A drone attack damaged the Novoshakhtinsk oil refinery in Russia, forcing it to suspend operations temporarily, Governor Yuri Slyusar said.

Heavy drone strikes on Russian refineries followed discussions at UN headquarters in New York on a potential energy-related ceasefire between Kyiv and Moscow.

Any deal to end the Russia-Ukraine war could allow Russia to export more energy. Russia, an OPEC+ member, was the world's third-biggest crude oil producer behind the US and Saudi Arabia in 2025, according to US energy data.

(Reporting by Scott DiSavino, Stephanie Kelly, Helen Clark and Sethuraman NR; Editing by Mark Potter, Kirsten Donovan and David Gregorio)

Key Takeaways

  • Oil prices dropped ~2% on Sept 25 amid hopes of a US‑Iran truce and talk of a US diesel export ban (marketscreener.com)
  • The Brent‑WTI spread reached its widest point since May, reflecting divergent regional risk profiles and logistical expectations (marketscreener.com)
  • Houthi attacks on Saudi infrastructure heightened supply concerns, even as discussions to reopen the Strait of Hormuz offered some market relief (marketscreener.com)

References

Frequently Asked Questions

Why did oil prices fall by about 2%?
Oil prices dropped due to hopes for a US-Iran truce and talks of a possible US ban on diesel exports, despite ongoing supply concerns in the Middle East.
What is the significance of the Strait of Hormuz in oil supply?
The Strait of Hormuz is a critical oil transit route, handling about 20% of global supplies before the Iran conflict. Reopening it could ease oil trade restrictions.
How does a potential US diesel export ban affect oil markets?
A US diesel export ban could reduce US crude processing, widen the Brent-WTI price gap, and impact global fuel supply chains.
What impact do Houthi attacks on Saudi Arabia have on oil prices?
Houthi attacks raise concerns over disrupted oil flows from Saudi Arabia, the world's largest exporter, contributing to market volatility.
How might US-China relations influence oil demand?
Any agreements to reduce trade tensions between the US and China could boost economic growth and increase global energy demand.

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