Iranian Attack on Tanker Brings Hormuz Shuttle Traffic to a Halt
N.R. Finch
Iran's sustained tanker attacks have paralyzed the Strait of Hormuz "shuttle run" trade — at least one shipowner now refuses to transit — directly threatening UAE crude exports as oil prices surge more than 10% this week.
What are "shuttle runs," and why do they matter so much?
Shuttle runs are a crude-transport method that expanded rapidly in recent months: tankers sail along the Omani coast and transfer cargo to other vessels outside the Strait of Hormuz, bypassing the most dangerous stretch.
The main operators are subsidiaries of Abu Dhabi National Oil Company (Adnoc) and vessels under South Korea's Sinokor.
In plain terms = think of it as a relay station at the mouth of the strait — small ships go in, load crude, come back out, and hand it off to larger ships that never enter the danger zone. The UAE hit a record-high production level last month, and shuttle runs were the backbone of that milestone.
After the attack, who is still willing to transit?
After two seafarers were killed on Tuesday, at least one shuttle-run operator said it will no longer transit Hormuz. Another is waiting for the situation to clarify.
The UAE wants to keep operating and has not changed policy, but will now assess each transit on a case-by-case basis.
This means → shuttle runs have not been "banned" — they have shifted from routine commerce to a political decision made voyage by voyage. When the pace slows, capacity shrinks on its own.
Insurance and crew — what are the two invisible chokepoints?
Enquiry volumes in the London insurance market have dropped sharply, and fewer underwriters are willing to cover the route. Some owners face quotes as high as 7% of hull value — for a $100 million tanker, that is a $7 million premium.
Simon Lockwood, head of shipowner business at Willis Towers Watson, put it bluntly: "Since the latest escalation, almost no vessels are moving."
Crew willingness is an equally hard barrier: seafarers have refused to transit in recent days, forcing owners to find replacements. IMO Secretary-General Arsenio Dominguez publicly advised companies not to risk transiting the strait.
In plain terms = even if you are willing to pay an extreme premium, you may not find anyone willing to board the ship — that is the real reason traffic has stalled.
Oil prices and supply — has the shock arrived yet?
Oil prices are up more than 10% this week; the market is already pricing in strait risk.
Asian buyers say they have not yet seen a visible drop in Middle Eastern crude supply — likely because ample inventories built over recent weeks have not been drawn down yet. The impact of reduced shipments takes time to reach the market.
The U.S. military launched fresh strikes against Iran on Wednesday morning, saying the aim was to degrade Iran's ability to attack commercial shipping — but whether strait security improves remains highly uncertain.
This means → the price rally reflects not "supply has been cut" but "the probability of a cut is rising." The real shock arrives only if the inventory buffer runs out before shipping resumes.
Content is for reference only, not financial advice.