Brent crude rose 0.28% to $91.87 a barrel on Thursday, marking a fifth straight session of gains, as a military and diplomatic impasse in the U.S.-Iran war kept Strait of Hormuz shipping well below pre-war levels and tightened global supply.

With peace talks stalled and the UAE severing financial ties with Iran, traders are weighing the risk of a prolonged supply shortfall from a region that once funnelled roughly one-fifth of global oil consumption through a single chokepoint 1.

Key Takeaways

  • Brent at $91.87; WTI October contract at $89.91 – both five-session highs
  • UAE suspends all financial and economic ties with Iran indefinitely
  • U.S. crude stocks rose 4.4 million barrels; distillates fell for third straight week

Market Reaction & Context

Brent crude futures for October delivery settled at $91.87, up 26 cents or 0.28%, by 0439 GMT on Thursday 1. The front-month U.S. West Texas Intermediate September contract added 17 cents to $86 a barrel, while the more actively traded October WTI gained 12 cents, or 0.13%, to $89.91 1.

Both benchmarks have now closed higher for five consecutive sessions, touching their loftiest levels since July 24 – a run that reflects sustained geopolitical risk premium rather than a demand-driven rally. Shipping traffic through the Strait of Hormuz remained unchanged week-on-week, with flows far below the volumes that moved through the waterway before the war began on Feb. 28 1.

Detailed Analysis

The conflict’s most consequential market effect continues to be the structural suppression of Iranian crude exports and the disruption of refinery feedstock flows more broadly. The Energy Information Administration reported Wednesday that U.S. distillate inventories – covering diesel and heating oil – fell for a third consecutive week, a signal that the war’s ripple effects are tightening refined-product markets even as headline crude stockpiles look less alarming 1.

U.S. crude inventories did rise by 4.4 million barrels in the week ended Aug. 14, well above analyst expectations of a 600,000-barrel draw, which capped any sharper price advance 1. Yet the inventory build has done little to dislodge the geopolitical premium baked into prices, with traders focused more on the diplomatic impasse than on weekly EIA data.

The UAE’s decision to suspend all financial and economic transactions with Iran until further notice has added a new layer of regional tension 1. Abu Dhabi’s move refocuses attention on the long-standing rivalry between the Gulf’s largest Arab oil producer and Tehran – and raises questions about whether other Gulf states could face similar pressure. Oman, which has historically served as a quiet back-channel between Washington and Tehran, is also caught in the crossfire, with President Trump having reportedly threatened economic consequences for any country that assists Iran 2.

On Tuesday, Trump said no talks were taking place with Iran and insisted the Strait of Hormuz was open 1. Tehran, however, maintained the waterway remained shut – a contradiction that underscores how muddled the information environment around this conflict has become for investors trying to price in resolution risk. For a broader view of how prior diplomatic shifts have whipsawed crude markets, see this earlier analysis of crude price swings tied to U.S.-Iran conflict developments.

Analyst Outlook

“Oil prices remained elevated as the market is supported by sporadic attacks in the Middle East but lacks fresh momentum without a major escalation,” said Hiroyuki Kikukawa, chief strategist of Nissan Securities Investment, a unit of Nissan Securities 1.

Kikukawa added that the market is “likely to maintain a gradual upward trend given uncertainty over peace talks and tensions involving the United Arab Emirates, Oman and Iran” 1. That framing – steady drift higher without a clear catalyst for a spike or collapse – describes the trading range that oil has occupied since the conflict entered its current stalemate phase.

Conclusion

For retail investors with exposure to energy equities or commodity ETFs, the near-term picture is one of range-bound prices underpinned by geopolitical risk but capped by incremental inventory builds. The September WTI contract expires Thursday, which may introduce short-term volatility as positions roll into October 1. A credible ceasefire signal or a resumption of diplomatic contact between Washington and Tehran would be the most significant downside catalyst to watch; absent that, analysts see the market’s upward bias holding. A prior price collapse driven by an earlier – and ultimately short-lived – easing of tensions serves as a reminder of how quickly the geopolitical premium can evaporate should negotiations resume.

Not investment advice. For informational purposes only.

References

1Obayashi, Yuka and Liu, Siyi (2026-08-20). “Oil gains on Middle East supply concerns amid impasse in US-Iran war”. Reuters. Retrieved 2026-08-20.

2(2026-08-20). “Oil prices steady as investors assess US-Iran war outlook”. Dawn. Retrieved 2026-08-20.