WTI crude surged 7.8% and Brent climbed 6.7% on Monday as Iran suspended nuclear negotiations and threatened to shut the Strait of Hormuz. Analysts warn prices could reach $180 per barrel if diplomacy collapses entirely

Key Highlights

  • WTI crude futures rose 7.8% to $94.20 per barrel; Brent gained 6.7% to $97.23 on Monday.
  • Iran announced a suspension of diplomatic exchanges with the US, citing Israeli military escalation in Lebanon.
  • Tehran threatened to shut the Strait of Hormuz, a chokepoint carrying roughly 20% of global oil Supply.
  • Rystad Energy warned prices could spike to $180 per barrel by August if peace talks collapse entirely.
  • Goldman Sachs flagged two-sided risks to its Q4 2026 Brent forecast of $90, citing both supply disruption and weak Demand.

A Geopolitical Shock Returns to the Oil Market

Crude Oil markets experienced their sharpest single-session rally in weeks on Monday, driven not by supply data or inventory reports but by a strategic announcement from Tehran. Iran's semi-official Tasnim news agency reported that the country's negotiating team would suspend the exchange of documents through diplomatic intermediaries, accusing Washington of deliberately prolonging negotiations while sending contradictory signals.

The announcement landed in markets already sensitive to Middle East risk. WTI crude futures climbed 7.8% to $94.20 per barrel, while Brent, the international benchmark, added 6.7% to near $97.23. Both contracts had recorded their worst weekly performance since mid-April in the prior session, with Brent and WTI each losing more than 9% across last week's trading.

The Hormuz Factor: Structural Supply Risk

Iran's threat to close the Strait of Hormuz added a structural dimension to what might otherwise be read as a diplomatic setback. The strait handles approximately one-fifth of the world's traded oil Volume. Any sustained interruption to navigation through the waterway would remove millions of barrels per day from global supply chains, affecting refiners across Asia, Europe, and the Americas simultaneously.

Tehran also referenced the Bab el-Mandeb Strait, the narrow passage connecting the Red Sea to the Gulf of Aden, as a potential secondary front. Both waterways together represent critical nodes in the architecture of global energy logistics, and the prospect of simultaneous pressure on either carries material implications for freight costs and insurance premiums beyond oil prices alone.

Analyst Scenarios: $70 or $180 Per Barrel

The range of outcomes now being modelled by energy analysts reflects the degree of uncertainty embedded in the current situation.

In the event that diplomacy fails entirely and active conflict between the US and Iran resumes, analyst placed a price of $180 per barrel by August as a credible stress scenario, one he characterised as consistent with a severe global Recession, particularly for Europe and emerging Asia.

The alternative scenario, a comprehensive agreement covering nuclear material and the reopening of Hormuz, would push prices back toward $70 per barrel by year-end as supply constraints ease and risk premiums unwind.

Goldman Sachs maintained a Q4 2026 Brent forecast of $90 and WTI at $83, while acknowledging risks in both directions. On the downside, the bank pointed to weak April oil retail sales data from China and Western Europe, estimating that demand shortfalls in these two regions alone could reduce consumption by approximately 2 million barrels per day relative to its existing forecasts.

Washington's Posture

Despite the breakdown in formal exchanges, US President Donald Trump expressed confidence on Monday that a deal with Iran remained achievable, posting on Truth Social that Tehran wanted an agreement and that outcomes would be favourable for Washington and its allies. Iranian Foreign Ministry spokesperson Esmail Baghaei struck a more cautious tone, acknowledging continued engagement but describing it as conducted under conditions of distrust.

The gap between these characterisations is itself a market variable. Until either side demonstrates movement toward a formalised framework, oil traders are likely to maintain a meaningful geopolitical premium in spot and futures pricing.