Iran Seizes Ships in Strait of Hormuz Despite US Ceasefire Extension

• On Tuesday, April 21, 2026, U.S. President Donald Trump said he would extend the ceasefire with Iran hours before it was set to expire, while maintaining a blockade over ships coming to and from Iran. The extension was intended to allow both sides to continue peace talks until Iran submits a new proposal and discussions are concluded.
• Despite the ceasefire extension, tensions have escalated materially, with Iranian gunboats firing on and seizing multiple vessels on Wednesday, April 22, 2026, including a cargo ship and a container ship, in the Strait of Hormuz, tightening control over the strategic waterway even as ceasefire conditions remain in place.
• This marks the first seizure of ships since the war began at the end of February 2026 and the latest in a series of maritime incidents, highlighting a clear deterioration in security along a critical global trade route. Consequently, traffic through Hormuz, which normally carries around one-fifth of global crude flows, has slowed to a near halt, while U.S. enforcement actions, including vessel interceptions, continue to disrupt shipping activity and constrain supply.
• Oil markets reacted immediately, with Brent crude rising above $100 per barrel, as investors priced in renewed supply risks amid the escalation and lack of diplomatic progress.
• Meanwhile, Iran has signalled it will not reopen the strait while the blockade remains and may attempt to break it by force, while U.S. officials have indicated restrictions will stay in place until negotiations are concluded, reinforcing the risk of further confrontation.
• Overall, the combination of a fragile, largely tactical ceasefire and ongoing maritime disruptions suggests limited prospects for near-term de-escalation, with restricted flows through Hormuz expected to keep oil markets tight and prices supported even beyond any eventual resolution.

(Sources: Reuters, Yahoo Finance & Bloomberg)