Oil Plunges as Trump Signals Possible End to Iran War

Brent crude is down by 7% this morning.

In ten days, crude oil shot from $66 all the way to $120 a barrel. That's an 80% spike. 

And investors everywhere, from retirees to active traders, were asking the same question: How bad is this going to get?

Then President Trump told CBS News that the Iran conflict would be "finished pretty quickly." He said the US Navy would escort tankers through the Strait of Hormuz. He even floated the idea of waiving oil-related sanctions. And just like that, crude oil plunged more than 10% before markets even opened.

Welcome to what may be the most volatile week for energy markets in years.

Let's break down what happened, who it affects, and what you should be thinking about as an investor.

Here's a geography fact worth knowing: about 21% of all the oil that ships around the world passes through a narrow strip of water called the Strait of Hormuz, a 21-mile-wide channel between Iran and Oman.

That's roughly 20 million barrels of oil every single day.

Gulf nations like Saudi Arabia and Kuwait suddenly had nowhere to send their oil. Storage tanks started filling up. Production cuts became necessary. And crude prices shot through the roof.

Kpler, the commodity tracking firm, reported that commercial operators, major oil companies, and insurers had basically created a "de facto closure" of the Strait. The risk premium was just too high.

G7 finance ministers held a meeting earlier on Monday ​to discuss a response to the ​overnight surge in oil prices caused ⁠by the U.S.-Israeli war on Iran. There was broad agreement not to release strategic oil ‌reserves just yet.

They also said ​in a statement they were ready to ​take "necessary measures" to support the global supply of energy, including the release of stockpiles, but stopped ​short of doing it now.

That's the core dynamic driving this whole situation.

‘Very soon’ but not this week.

On Monday evening, Trump gave an interview to CBS News. He said the operation against Iran was "ahead of schedule," that the US had hit over 5,000 targets, knocked out 90% of Iran's missile capability, and reduced drone launches by 83%.

He followed that up with a post on Truth Social warning that if Iran disrupted oil flows through the Strait, they'd be hit "twenty times harder." And then he promised that the US Navy would escort tankers through, effectively offering a security guarantee to shippers.

Markets read this as: the worst-case supply disruption might not last much longer.

Brent crude fell more than 7% on Tuesday morning, from around $98 back to $91. WTI fell to $87. 

S&P 500 futures climbed 0.4%. Europe's Stoxx 600 was on track for its biggest rally day since April.

But here's the honest part: nobody actually knows when this ends. And Iran's foreign minister was blunt about it. He told PBS that Iran has "very bitter experience" negotiating with America and that talks were no longer on the table.

So we've got a lot of noise, and the reality is somewhere in between.

When the big banks speak, it's worth listening. 

Goldman Sachs said the fair value for Brent crude, without the war, is around $65 a barrel. The fact that markets were pricing it at $98+ meant traders were betting on about four weeks of supply disruption. Goldman also said that if the Strait of Hormuz stays disrupted for five more weeks, oil could easily hit $100. And if the war drags into summer? Their more extreme scenario goes well past $120, potentially to $147.

JPMorgan Chase analyzed the Gulf nations' oil storage capacity and concluded they could run out of space in under a month if the Strait stays closed. That would force production cuts on top of shipping cuts, a double supply shock.

JPMorgan's Global Research team had previously set a 2026 base case for Brent at $60, based on soft demand and strong non-OPEC supply. But that was before any of this. They still expect the geopolitical premium to "eventually subside" as underlying fundamentals reassert themselves.

Morgan Stanley is telling clients to look at defense, aerospace, and industrial resilience in their 2026 portfolios. That's a different kind of opportunity signal.

This is where it gets concrete.

Energy stocks surged. ExxonMobil $XOM, Chevron $CVX, and Occidental Petroleum were up 3–6% over the 5-day period. The logic is simple: higher oil prices mean fatter profit margins. If you're already holding energy names, last week was kind to you. USO, the US Oil Fund ETF, is up more than 30% YTD.

Defense names popped. Lockheed Martin, Boeing, and other defense contractors got a lift. War tends to drive up defense budgets, and markets are forward-pricing that.

Airlines got crushed. United Airlines and American Airlines each dropped roughly 9–11% in five days. Jet fuel is their single biggest cost. When oil goes to $100, airline margins evaporate. The JETS ETF was down nearly 9%.

Gold held firm at record highs. It hit $5,180 an ounce Tuesday, up nearly 40% over the last year. That's not a surprise. 

The broad market got nervous. The S&P 500 fell around 1.5–2% during the worst days of the spike. 

But it bounced back quickly once Trump's comments hit the wires.

Here's the thing most financial media glosses over.

Carley Garner, a senior commodity strategist at Carley Trading, made a point that cuts right to it: without the Iran war premium, oil would likely be trading in the $40s. That's because global supply was expected to outpace demand in 2026, US shale production is near a record, OPEC+ has been struggling to manage output, and EV adoption keeps eating into oil demand at the margin.

The actual fundamentals for oil? Pretty bearish long-term.

What you're watching right now is a fear premium. And fear premiums don't last forever.

The historical pattern, as Goldman's own analysts note, is consistent: geopolitical fear spikes prices, supply holds better than expected, the rally fades. We saw it after the 2022 Russia-Ukraine invasion. We saw it during past Iranian crises.

We might be watching the same script play out again right now.

That doesn't mean you should ignore the war. The situation is still fluid and real people are being affected. But it does mean the responsible investor's question isn't "should I panic buy energy stocks today?" 

It's: How long does the disruption actually last? And what's already priced in?

Oil markets just gave us a masterclass in how fast fear can move prices. A $53 swing in crude, from $66 to $119 and back toward $87, in under two weeks. That's wild volatility.

Trump's signals are calming markets for now. But the Strait of Hormuz is still running at reduced capacity. Iran is not talking. What about Israel’s goals? The conflict is still active.

Trump’s signal doesn’t really mean that conflict is over. 

Watch Trump's statements, Strait traffic data from Kpler, and any G7 emergency reserve announcements.

If you're a long-term investor, zoom out. The underlying fundamentals for oil are still soft. The geopolitical premium will fade, history says so. But defense, energy infrastructure, and safe-haven assets like gold may have room to run in a world where this kind of volatility becomes more common.

Stay informed. Stay calm. 

Don't make decisions based on headlines from a single morning.