Oil prices dropped sharply on Monday, May 25, 2026, sliding to their lowest levels in two weeks as markets responded to a complex mix of cautious diplomatic optimism and unresolved sticking points in the US-Iran peace negotiations. The move reflects a market caught between two powerful forces: the hope of a deal that could reopen the Strait of Hormuz, and the reality that Washington and Tehran remain fundamentally divided on key terms.
The Numbers: Brent and WTI Both Hit Two-Week Lows
Brent crude futures fell $4.71, or 4.55%, to $98.83 a barrel, while U.S. West Texas Intermediate (WTI) was at $92.03 a barrel, down $4.57, or 4.73%. Both contracts touched their lowest levels since May 7 earlier in the session. The sell-off was driven primarily by renewed diplomatic optimism following weekend statements from President Trump — but quickly ran into resistance as the full picture of unresolved disagreements came into view.
What Triggered the Drop: Trump's MOU Claim
On Saturday, U.S. President Donald Trump said that Washington and Iran had "largely negotiated" a memorandum of understanding on a peace deal that would reopen the Strait of Hormuz, which before the conflict carried one-fifth of global oil and liquefied natural gas shipments. However, the two sides remain at odds on several difficult issues, with Trump saying on Sunday he had told his representatives not to rush into any deal with Iran.
The contradiction — a near-deal one day, a warning not to rush the next — encapsulates the whiplash that has characterized oil markets throughout the US-Iran war. Traders have repeatedly priced in diplomatic progress only to see hopes dashed by renewed escalation or contradictory statements from both sides.
The Core Obstacle: The Strait of Hormuz
The Strait of Hormuz remains the central flashpoint in both the military conflict and the peace negotiations. Iran has maintained effective control of the waterway since the conflict began on February 28, 2026 — dramatically disrupting global energy flows. Around 25% of global seaborne oil trade transits through the Strait, with roughly 80% of those flows destined for Asian markets. Iran's refusal to commit to a full, unconditional reopening of the strait — while the US insists on it as a non-negotiable precondition — remains the deal's most visible and consequential sticking point.
Tehran has also flatly denied having agreed to surrender its enriched uranium stockpile, contradicting reports from U.S. officials — adding another layer of complexity to an already fraught negotiation. Meanwhile, Iran's denial of key claims made publicly by American negotiators is making it increasingly difficult for either side to build domestic political support for a final agreement.
Oil's Wild Ride Since the War Began
Monday's decline is part of a broader and historically extreme pattern of oil price volatility since the conflict erupted. In March 2026, oil prices surged more than 60%, marking their largest monthly gain on record and reaching their highest levels since 2022. The April 8 ceasefire briefly reversed those gains: the price of benchmark Brent crude dropped below $100, falling by about 15.9% to $92.30 a barrel, while US-traded oil was almost 16.5% lower at $93.80 a barrel — before stabilising as the ceasefire proved fragile and negotiations dragged on.
If the U.S. and Iran reach a quick peace deal that opens the Strait of Hormuz by June, Brent prices would ease to around $80 per barrel by the end of 2026, according to consulting firm Wood Mackenzie. That scenario would represent a significant relief for inflation-pressured economies — but hinges entirely on whether the current negotiations can bridge the remaining gaps.
What Markets Are Watching Now
Oil traders are now closely tracking three key variables: the pace of US-Iran nuclear talks, any change in Iran's posture on the Strait of Hormuz, and whether Trump's instruction not to "rush" a deal signals a genuine recalibration of negotiating strategy or simply tactical posturing. For comprehensive and real-time data on global crude oil prices, supply flows, and energy market analysis, the International Energy Agency's Oil Market page provides authoritative and continuously updated information for investors, analysts, and policymakers alike.
Until a verified, comprehensive peace framework is in place — one that clearly addresses the Strait of Hormuz, nuclear enrichment, and sanctions relief — oil markets will remain highly sensitive to every headline out of Washington and Tehran. Monday's $4-plus drop is a reminder that in this environment, diplomatic signals move barrels just as powerfully as supply and demand fundamentals.