- Ships largely avoided the Strait of Hormuz after Iran fired what appeared to be warning shots at vessels.
- U.S. seized an Iranian cargo ship escalating tensions; Iran refused peace talks.
- Oil prices rose about 5% amid fears of U.S.-Iran ceasefire collapse and halted traffic.
LONDON — Ships were largely avoiding the Strait of Hormuz on Monday after an escalation at the weekend in which Iran fired what appeared to be warning shots at vessels, and the U.S. military seized an Iranian cargo ship.
Just one ship exited the Gulf through the strait while two entered in the space of 12 hours, ship-tracking data showed on Monday, a fraction of what is usually about 130 vessels per day.
The oil products tanker Nero, which is under British sanctions for Russia-related activities, was sailing through the strait, satellite analysis from SynMax and tracking data from the Kpler platform showed.
Two other ships — the chemical tanker Starway and Axon I, a liquefied petroleum gas tanker under U.S. sanctions for past trading with Iran — were sailing into the Gulf.
More than a dozen tankers passed through the strait after Iran briefly declared it open on Friday. But a ceasefire between the United States and Iran appeared in jeopardy on Monday as Iran vowed to retaliate for the U.S. seizure of its vessel and refused to join new peace talks.
War insurance rises
Oil charterers had been preparing tankers to leave the Gulf after the announcement on Friday.
That announcement triggered a sharp fall in oil prices, and war risk insurance rates started to fall.
Those rates have since risen again, to levels around 3% of the value of the ship from 2%, shipping and insurance sources said.
"Recent weeks have brought several false starts and, although some form of resolution is likely at some point, the timing of any durable breakthrough remains highly uncertain," ship broker Clarksons said in a note on Monday.
Iran fired shots at ships in the strait on Saturday, including a container ship belonging to CMA CGM, the French firm confirmed, describing them as "warning shots" and adding that the crew was safe.
US waiver on Russian oil
With a view to cooling soaring oil prices, the Trump administration on Friday renewed a waiver on sanctions on Russian oil at sea, allowing buying to resume for about a month.
Oil prices were up about 5% on Monday on fears that the ceasefire between the United States and Iran could collapse and as traffic through the strait remained largely halted.
Brent crude futures were up 3.8% to $94.75 a barrel by 1:25 p.m. (7:25 a.m. MDT) and U.S. West Texas Intermediate was up 4.0% at $87.82 by 1:39 p.m. (7:39 a.m. MDT).
Two days earlier, Treasury Secretary Scott Bessent had said Washington would not be renewing the waiver.
A similar one-month sanctions waiver allowing Iran to export crude oil and products lapsed on Sunday.
India, which has been a top buyer of Russian crude while others have demurred since Moscow's invasion of Ukraine in 2022, named three more Russian insurers that it will allow to offer marine cover to shippers.
The now 11 Russian companies it recognizes are not part of the International Group of P&I Clubs, which provides liability cover for personal injury or environmental clean-up claims for the majority of the world's tankers.
Contributing: Gus Trompiz, Nidhi Verma, Ismail Shakil, Timothy Gardner, Jasper Ward, Gleb Bryanski and Jason Neely
