TLDR
- Brent crude prices jumped more than 9% to approximately $104 per barrel following Washington’s announcement of an Iranian vessel embargo
- The naval embargo of the Strait of Hormuz comes after weekend US-Iran peace negotiations in Pakistan ended without agreement
- Tehran declared it “will not allow” the trade restriction and dismissed prospects for renewed nuclear negotiations with Washington
- The strategic waterway has been functionally closed since combined US and Israeli military operations against Iran commenced in late February
- OPEC has issued warnings that destruction of regional energy infrastructure will create lasting supply disruptions
Oil prices experienced dramatic gains Monday following the US military’s declaration that it would enforce a blockade on all commercial shipping conducting trade with Iran, pushing Brent crude over the $100 per barrel threshold for the first time in recent months.
Brent futures climbed as high as 9.1% to reach nearly $104 per barrel. European natural gas contracts surged almost 18% during peak trading. US crude similarly advanced more than 7%.

The embargo targets all commercial vessels departing from or arriving at Iranian maritime facilities. It specifically does not restrict other shipping traffic attempting transit through the Strait of Hormuz waterway itself.
US Central Command announced enforcement operations would commence at 10 a.m. New York time Monday. The declaration followed the breakdown of diplomatic negotiations between Washington and Tehran in Islamabad during the previous weekend.
Vice President JD Vance headed the US negotiating team and departed Pakistan early Sunday morning after 21 hours of intensive discussions yielded no breakthrough. Major disagreements centered on Iran’s nuclear development program, reopening the Hormuz waterway, and Tehran’s assistance to regional proxy organizations including Hezbollah.
Iran characterized US negotiating positions as “excessive.” Officials from the country stated they had no intention of resuming nuclear discussions. Trump responded to journalists: “I don’t care if they come back or not.”
Iran’s military adviser to the supreme leader, Mohsen Rezaee, stated Iran “will not allow” the US trade restriction and possessed countermeasures to resist it.
The Strait of Hormuz had already been functionally inoperative since combined US and Israeli military strikes against Iran initiated in late February. Iran had been imposing transit charges on certain vessels and maintaining traffic at significantly reduced levels compared to pre-conflict volumes, eliminating roughly 20% of world’s oil supply.
Scramble for Crude Supply
Refineries and commodity traders globally are now urgently seeking immediately accessible crude shipments as physical availability continues tightening.
Certain market analysts predict further price escalation. Jorge Montepeque of Onyx Capital Group stated to Bloomberg TV the market is underestimating the danger. “It really makes no sense — it should be $140, $150,” he commented.
Monday morning witnessed two petroleum tankers attempting to depart the Gulf through the Strait by navigating close to Iranian territorial waters — the initial vessels to make the attempt since the blockade announcement.
China Factor
Iran continued exporting crude oil and condensate from the Persian Gulf throughout March, with China representing the primary receiving nation. Several tankers transporting oil designated for China are now affected by the blockade implementation.
Former US Ambassador to Saudi Arabia Michael Ratney expressed concerns regarding potential scenarios if US Navy vessels attempt intercepting those ships, cautioning about a possible crisis in US-China diplomatic relations.
The Wall Street Journal indicated that Middle Eastern governments were working to facilitate renewed ceasefire negotiations between Washington and Tehran within the next several days.
OPEC is scheduled to release its monthly market assessment later Monday.



