Crude Prices Spike 8% as Iranian Vessel Seized and Strait of Hormuz Shuts Down Again

Key Highlights

• US naval forces intercepted and captured an Iranian cargo vessel attempting to breach a maritime blockade in the Gulf of Oman
• Tehran reimposed its closure of the Strait of Hormuz following a brief weekend reopening
• Brent crude prices soared by 7.9% while European natural gas prices jumped 11% during Monday trading
• The temporary ceasefire agreement between Washington and Tehran is scheduled to end on April 21, with diplomatic progress uncertain
• Vessel movement through the Strait of Hormuz has virtually halted, with only minimal maritime traffic observed

Energy markets experienced dramatic volatility on Monday following a US military operation that resulted in the capture of an Iranian cargo vessel, combined with Tehran’s decision to reimpose its blockade of the strategically vital Strait of Hormuz.

Brent crude oil prices rallied by as much as 7.9% during trading sessions, clawing back the majority of losses sustained on Friday when prices had plummeted more than 9% after Iran’s temporary announcement of reopening the critical shipping channel. European natural gas futures experienced an even steeper climb, surging up to 11%.

President Donald Trump publicly acknowledged that US naval forces had engaged and seized the Iranian-registered ship operating in the Gulf of Oman. According to Trump’s statement, the vessel had refused to comply with multiple instructions to halt its progress as it approached the Strait of Hormuz.

Tehran issued strong condemnations of the seizure and issued warnings of potential retaliatory measures. Iranian state-controlled media outlets reported that government forces had opened fire on multiple other vessels attempting passage through the waterway during the weekend period before reimposing the closure on Saturday.

Iranian officials argued that the US naval blockade targeting Iranian-affiliated vessels constituted a breach of the existing ceasefire terms, which are scheduled to lapse on Tuesday, April 21.

The Strait of Hormuz serves as a critical chokepoint for global energy supplies, facilitating the passage of approximately one-fifth of worldwide oil shipments and liquefied natural gas exports. Maritime operations through the strait have faced severe disruptions since the US-Israeli war against Iran commenced in late February.

Diplomatic Uncertainty Looms

Significant uncertainty surrounds whether renewed diplomatic negotiations will occur prior to the ceasefire expiration. Trump announced that a US diplomatic contingent, including Vice President JD Vance, special envoy Steve Witkoff, and senior advisor Jared Kushner, would travel to Islamabad on Monday evening for scheduled discussions on Tuesday.

However, Iranian state media sources indicated that Tehran has declined additional negotiation opportunities. The Tasnim news agency conveyed that Iran would not dispatch representatives to Islamabad and has refused to participate in talks while US naval blockade operations continue.

Maritime commerce through the Strait of Hormuz reached near-total paralysis on Monday. Tracking data showed only a single oil products tanker attempting an outbound passage, with merely two other vessels navigating in the inbound direction.

Oil prices had previously climbed to nearly $120 per barrel at the outbreak of hostilities, before retreating during the past fortnight as Trump floated possibilities of a diplomatic resolution.

Market Expert Perspectives

Financial analysts at OCBC suggested that markets may have been overly optimistic about the timeline for restoring energy flows. “The standoff looks set to drag on as both sides test pain thresholds,” their analysis stated.

Haris Khurshid of Karobaar Capital observed that markets continue to incorporate a risk premium without fully committing to higher price levels. He projected that crude prices could gradually advance toward the $105–$115 range if current tensions persist.

Robert Rennie of Westpac Banking indicated that physical fuel costs would remain under sustained upward pressure for as long as shipping through the Strait of Hormuz stays restricted.

The fourteen-day ceasefire arrangement between the United States and Iran reaches its expiration point on April 21, with no confirmed diplomatic meetings scheduled as of Monday evening.