Iran Denies US Warship Passage, Oil Surges 3% on Renewed Risk

An Iranian official's denial of a US warship passage through the Strait of Hormuz on April 11 has injected fresh volatility into global energy markets, challenging a fragile two-week ceasefire and causing oil prices to rebound more than 3 percent. The move signals that the waterway, a vital artery for global trade, remains a flashpoint, with the geopolitical risk premium far from being erased from crude prices.

"The chances of a meaningful reopening of the Strait of Hormuz any time soon look dim," said Vandana Hari, founder of oil market analysis provider Vanda Insights. "The futures market looks a bit broken. Otherwise, prices should have snapped right back to pre-ceasefire levels by now."

The denial immediately reversed earlier optimism that saw both major oil benchmarks fall below $100 per barrel. Brent crude futures for June delivery subsequently rose $2.18, or 2.3%, to settle at $96.93 a barrel. U.S. West Texas Intermediate (WTI) crude climbed $3, or 3.18%, to end the session at $97.41 a barrel, erasing the previous day's losses.

At stake is the security of the world's most critical energy chokepoint. The Strait of Hormuz, a narrow channel between Iran, Oman, and the United Arab Emirates, handles roughly 20 million barrels of oil per day—about 20% of global supply—along with one-fifth of the world's liquefied natural gas. Any prolonged disruption threatens to send energy prices soaring, further complicating the global fight against persistent inflation.

Conflicting Reports Deepen Uncertainty

According to Iran's Tasnim News Agency, a high-level source on Thursday described reports from U.S. officials of a successful passage as a "media operation" intended to cover up a "battlefield失利" (battlefield loss). This direct contradiction of the U.S. narrative strikes at the heart of the stability pact that had, for a moment, calmed markets. While Iran has reportedly issued maps to guide ships around mines, the conflicting statements leave shippers with little confidence to resume normal operations.

"Logistic disconnects, security fears, elevated insurance premiums and operational constraints mean that very little additional energy is likely to be supplied via the Strait of Hormuz in the next two weeks," analysts at Standard Chartered said in a note.

The initial ceasefire announcement on Tuesday had been met with a relief rally in global markets. Goldman Sachs, for instance, had trimmed its second-quarter 2026 forecasts for Brent and U.S. crude to $90 and $87 a barrel, respectively, on the assumption of a reopening waterway. That optimism has now evaporated, replaced by the familiar pattern of uncertainty that has defined the region.

Toll Proposal and Regional Attacks

Complicating any long-term resolution is a controversial proposal, mentioned by former President Donald Trump, for a joint US-Iranian toll system for ships using the strait. The suggestion was swiftly condemned. A spokesperson for the U.N.'s International Maritime Organization told Reuters that such a toll would "set a dangerous precedent," as no international agreement provides for such charges in international straits. Representing the world's largest shipping power, Greek Prime Minister Kyriakos Mitsotakis called the idea "completely unacceptable."

The viability of the ceasefire itself is further questioned by ongoing regional hostilities. Iran reportedly struck a pipeline in Saudi Arabia that serves as a bypass to the strait, according to an oil industry source. Concurrently, Kuwait, Bahrain, and the UAE also reported missile and drone attacks after the ceasefire began. These actions underscore the fragility of any agreement and highlight the multiple fronts on which the conflict could reignite. The last major escalation in the Strait of Hormuz in 2019 saw oil prices jump nearly 15 percent in a single day, a precedent that keeps traders on high alert.

This article is for informational purposes only and does not constitute investment advice.