Imagine telling a fifth of the world’s daily oil supply that it has to take the long way to its destination. That has been the story of the past three months.
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The Strait of Hormuz handles roughly a fifth of all seaborne oil and almost a third of the world’s liquefied natural gas, also known as LNG. The eighteen-mile passage between Iran and the Arabian Peninsula has been effectively closed since early February. Persian Gulf tankers are now sailing the long route around Africa, adding two weeks or more to every voyage.
If you own tanker stocks, this is the most important thing happening to your portfolio right now. The disruption hits every name on the watchlist. It also rewrites how each company should be valued going into Q1 earnings.
1. The conspiracy: Iran’s shadow fleet and the toll system
Three months in, the closure has hardened into a system. Iran is no longer just blocking the strait. It has set up what the U.S. Treasury calls a toll regime.
Tankers wanting to transit the strait must pay Iranian-controlled operators in dollars or gold. The U.S. Treasury warned last week that those payments could trigger U.S. sanctions for any company that makes them. Most major tanker operators have refused, choosing the longer Cape of Good Hope route instead.
Behind the toll system sits a different kind of fleet. Iran’s shadow tankers, ships sailing under flags of convenience and switching their tracking transponders off to hide their movements, continue to carry Iranian oil out of the strait. Western tankers go around. Iranian shadow tankers stay.
What you have now is a two-track tanker market. Sanctioned ships and rule-following ships are operating in two completely different worlds, even though they were navigating the same waters six months ago.
Western tankers go around. Iranian shadow tankers stay. Six months ago they were navigating the same waters.
2. The map: how oil is being rerouted
Open up a globe. Find the Persian Gulf. The trip from there to a Chinese refinery, when Hormuz is open, runs about 6,500 nautical miles round trip.
The same trip, when you have to swing around the Cape of Good Hope, back up the African coast, and across the Indian Ocean, runs about 12,000 nautical miles. Almost double the distance, and almost double the days at sea.
Every barrel of Persian Gulf oil heading to Asia now rides a tanker for an extra two weeks per voyage. The barrels still get delivered. They just take longer, and they tie up more ships per delivered barrel than they did six months ago.
Picture a busy New York commute when one of the bridges closes. The same number of cars still need to cross the river, but they all squeeze onto fewer routes, and each commute takes twice as long. That is the global tanker market right now.
3. The winner: tanker stocks running on extra voyage days
Here is the strange part of a chokepoint closure. The longer the voyages, the more money tanker companies make. The trade has a name in shipping: ton-mile demand.
When ships have to sail farther to deliver the same barrel of oil, the world needs more ships in the water at any one moment to move the same total volume. That tightens supply. When supply is tight, daily rates spike.
Q1 spot rates for supertankers, the largest crude tankers carrying about two million barrels of oil each, ran between seventy thousand and ninety-five thousand dollars per ship per day. Industry watchers tied roughly twenty thousand of that daily rate directly to Hormuz rerouting. That math is now baked into Q1 earnings.
The longer the voyages, the more money tanker companies make. That is the strange logic of a chokepoint closure.
Frontline (FRO), the watchlist’s largest pure crude tanker operator, sits at the center of this trade. Its supertanker fleet runs Persian Gulf to Asia routes by default. Every closed week of Hormuz adds direct revenue to its quarterly earnings.
DHT Holdings (DHT) sits in the same boat, just smaller. DHT’s fleet is one hundred percent supertanker. The smaller fleet means faster pass-through of rate gains to the dividend formula, since DHT pays out one hundred percent of net income above a small cash cushion.
Seaways (INSW) and Teekay (TNK) capture the same trade through their mid-size crude tanker exposure. Mid-size crude tankers running West Africa to Europe routes have also tightened, partly because more vessels are stuck on the longer Asia route and not available for Atlantic work.
So which name benefits most? On a per-share basis, DHT. On a total revenue basis, Frontline. On the Atlantic spillover, Seaways and Teekay.
4. The loser: ships stuck on the wrong side
Not every tanker is winning. The closure split the global fleet in half on day one.
Ships that were already inside the Persian Gulf when Hormuz closed had to choose. They could wait for an opening, risk the toll system, or charter out at deep discounts to pick up scraps of work.
Some moved their ships into Saudi Arabian or Omani ports to wait it out. Saudi export terminals on the Red Sea coast have been the busiest they have been in years, taking some of the strain off the Persian Gulf trapped capacity. Other operators chartered out their ships at rates well below the Cape of Good Hope premium just to keep them earning something.
Ardmore (ASC) and Hafnia (HAFN), both heavy in midsize fuel tankers that haul gasoline, diesel, and jet fuel, have been the trickiest cases. Refined fuel cargoes can’t easily reroute the same way crude can, because tank-cleaning rules and product specs limit which voyages a ship can switch between.
The lesson for investors is simple. Not every tanker stock benefits equally from a chokepoint event. Crude tanker operators with global routing flexibility are the cleanest plays. Fuel tanker operators are mixed. And anyone caught with the wrong fleet in the wrong place takes a hit, even on a strong day for spot rates.
5. What to listen for on Q1 calls
Three things to listen for on the next round of earnings calls. Each one tells you something different about how management reads the closure.
First, the duration assumption built into Q2 guidance. Companies have to bake some view of how long Hormuz stays closed into their forward forecasts. A management team that assumes a quick reopening is essentially calling for spot rates to fall. A team that assumes another quarter or two of closure is calling for rates to stay strong.
Second, ton-mile language. Listen for whether management explicitly quantifies the rerouting impact on their daily rates. If they call out the Cape of Good Hope premium by number, that signal usually means they expect the premium to last more than a few weeks.
Third, fleet positioning. Some operators have moved ships to alternative loading regions: the Atlantic basin, the Mediterranean, the U.S. Gulf. Others are keeping fleet allocations the same and waiting. The choice tells you whether management treats the closure as temporary or permanent.
The honest answer is that nobody knows when Hormuz reopens. What you can know is what your tanker stocks earn while it stays closed. The longer it stays closed, the better the math gets for the watchlist’s crude tanker names. That trade is still running.