Oil pushed higher on Monday after Iran signaled it could take a more aggressive stance in the Strait of Hormuz, reviving fears that the world's most important oil chokepoint stays shut. Brent crude climbed 2.8% to $91.03 a barrel, back above $90 for the first time in weeks, while US benchmark WTI rose 2% to $84.08.
The trigger was a warning from a senior Iranian official, who told Reuters that Tehran is prepared to drop its defensive stance and go, in the official's words, "fully offensive" if talks with Washington keep going nowhere.
Talks stall, threats grow
Iran and the United States have spent months trying to negotiate a permanent end to the war that Washington and Israel began on February 28. Those talks have stalled, and with them any hope of quickly restarting normal tanker traffic through Hormuz.
The official said Iranian forces should stand ready to raise the pressure around Hormuz and across the Gulf, and that Tehran could hit the US naval blockade with a sharp, carefully timed strike if diplomacy collapses. Iran also ruled out extending an interim deal that has already fallen apart.
That interim agreement broke down over a single question: who controls the Strait of Hormuz. Tehran read the memorandum as handing it authority over the waterway, which it shares with Oman. Washington saw it differently, and the deal collapsed.
Why the market reacts so fast
Roughly a fifth of the world's oil moves through Hormuz, so any hint that Iran might tighten its grip sends traders scrambling. The war premium that drove crude sharply higher last week had eased a little, but Monday's threat put it straight back.
Supply is already stretched. Analysts expect the conflict to strip roughly 4% off global oil output this year, pushing an already tight market deeper into deficit. Against that backdrop, traders treat every escalation as a reason to buy.
What to watch
- Any Iranian move against tankers or the US naval presence in the Gulf
- Whether Washington and Tehran return to the table or dig in
- The next reading on how much crude is still slipping out of Hormuz
For now the market is pricing in trouble rather than relief. As long as the strait stays contested, oil looks set to keep its risk premium, and $90 Brent may be the going rate until the shooting stops.