U.S.-Iran Deal Reopens Strait of Hormuz: What It Means for Oil Stocks, Energy Markets, and Your Portfolio

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Last Sunday night, President Donald Trump announced that the U.S. and Iran had reached a memorandum of understanding to end active hostilities and reopen the Strait of Hormuz. The agreement removes the U.S. naval blockade of Iranian ports and extends the current ceasefire for 60 days. A formal signing ceremony was originally set for June 19 in Switzerland, although it was actually ratified on June 17.

The markets responded immediately…

The S&P 500 Index rose roughly 1.7%, oil prices fell nearly 5%, Japan’s Nikkei 225 Index surged roughly 5%, and South Korea’s KOSPI jumped 5.2%. Trump posted on the social media website Truth Social…

“Ships of the World, start your engines. Let the oil flow!”

This is the most significant geopolitical development for the markets in 2026. Here is what investors need to understand…

The U.S.-Iran Ceasefire: A Pause in Conflict, Not a Permanent Peace

The agreement sets a 60-day window for negotiations on Iran’s nuclear program, sanctions, and regional security. The Strait of Hormuz won’t officially reopen until the formal signing Friday.

Two things are getting less attention than they deserve…

The first is the “frozen funds” question. Iran’s state media reported the draft memorandum calls for $24 billion in Iranian assets to be released during the 60-day talks. Trump publicly denied any money would change hands.

The likely resolution runs through Persian Gulf intermediaries. Qatar and Saudi Arabia would facilitate the transfer rather than any direct U.S. payment, giving Trump a clean political story while Tehran gets the economic relief it demanded.

Iran has been clear that any nuclear talks won’t begin without that. If it falls apart, the 60-day clock will never really start.

The second is Israel, which has not signed on to this deal and has said publicly that it intends to hold seized territories.

In other words, the broader conflict isn’t resolved. What was agreed Sunday night is a pause, not a peace.

Iranian Oil Supply Could Return Faster Than Markets Expect

Oil prices fell roughly 5% on the news. West Texas Intermediate (“WTI”) crude oil dropped below $80 per barrel, its lowest level since March.

Tankers are sitting in the wrong positions. Production facilities that were throttled back need time to restart. Insurance markets for Gulf transits remain a mess, and no shipping company will rush back in until the security picture is clearer.

The supply relief is real, but it won’t show up at a refinery overnight.

The bigger price story is Iran coming back as a seller…

Before the conflict, Iran was moving roughly 1.5 million to 1.7 million barrels per day into global markets, most of it to China. The blockade knocked that production below 300,000 barrels per day.

The ceasefire immediately clears the way for Tehran to resume its oil sales. And analysts think Iran can add 500,000 to 800,000 barrels per day within months even before any sanctions are lifted..

That’s a real supply addition on top of whatever the Strait of Hormuz reopening unlocks from other Gulf producers.

It also creates a problem for OPEC+. Saudi Arabia has been cutting output to hold prices up, but that discipline was already breaking down before this deal. The UAE quietly left OPEC last month and announced plans to push output above 5 million barrels per day. Iran returning to market at scale now adds a third major producer breaking from the pack.

If Saudi Arabia decides to defend share rather than price in response, the market could face a supply wave that pushes the price of WTI crude oil well below current levels.

That scenario isn’t priced in yet.

Energy and Defense Stocks Lose Their War Premium

Energy stocks took the most direct hit…

ExxonMobil (XOM) fell roughly 4.1% and Chevron (CVX) dropped roughly 3.6%. Both oil giants had been up around 22% to 23% on the year coming into the deal against roughly 10% for the broader market.

That gap was the war premium. It’s now closing up.

Valero Energy (VLO) and Marathon Petroleum (MPC) fell 3.7% and around 5%, respectively. There’s no safe corner of the energy sector when the core thesis is cheaper oil.

Defense is a more complicated picture…

When the war started on February 28, Northrop Grumman (NOC) surged 6%, RTX (RTX) rose 4.7%, Lockheed Martin (LMT) gained 2.8%, and L3Harris Technologies (LHX) jumped 3.8% in the first session. All of these stocks had already reversed by late April as RTX and Lockheed both missed elevated earnings expectations.

The ceasefire removes another layer of support, but it doesn’t kill the long-term case…

Lockheed’s F-35 backlog runs for years. Northrop’s B-21 and Sentinel programs are decade-long commitments that don’t move on a headline. RTX is the most-exposed name because its revenue is tied to near-term munitions cycles. Expect a trim in the most conflict-exposed positions, not a wholesale exit from the sector.

Market Winners: Why Lower Oil Prices Benefit Airlines, Cruise Lines, and Tech

Airlines and cruise lines had the best day…

United Airlines (UAL), Delta Air Lines (DAL), American Airlines (AAL), and Southwest Airlines (LUV) each gained 1% to 3%. The industry trade group the International Air Transport Association, had been projecting airline fuel costs would hit $350 billion this year, up 40% from $252 billion in 2025, with profits expected to fall by half. Every dollar that comes out of jet fuel goes straight to earnings.

Meanwhile, Royal Caribbean Cruises (RCL) gained roughly 4.3%, Norwegian Cruise Line (NCLH) jumped 4.8%, and Carnival (CCL) climbed 4.6%.

Tech and growth stocks win through the Federal Reserve…

Lower oil takes pressure off inflation. Less inflation pressure gives the Fed room to cut interest rates. And when rates fall, growth stock like tech, software, and AI, get more valuable, because investors pay more today for earnings that are years away.

The Nasdaq Composite Index gained roughly 3% on the day. That trade has further to run if the deal holds.

The Bottom Line

The deal is real. The Strait of Hormuz is reopening. The supply shock that drove oil above $100, kept inflation elevated, and ground down fuel-sensitive businesses for months is starting to break.

But none of the hard problems have been solved…

The “frozen funds” mechanism needs to work. Iran and the U.S. must agree on a nuclear framework within 60 days. Israel has to get to the table eventually. Each one of those things presents a genuine risk of breakdown, and any of them could snap the war premium back into the markets overnight.

The stocks that got hammered by this conflict deserve a fresh look. The ones that were carried by it deserve scrutiny.

Size your positions for the opportunity. But leave room for the deal to get complicated – because this one almost certainly will.

Good investing,

John Evelius

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