Roughly 20 million barrels of crude, condensate and fuel move through the Strait of Hormuz every day. On Saturday, that traffic effectively stopped, as shippers and traders pulled energy cargoes out of the waterway on safety fears and warnings from authorities.
The trigger was military. The United States and Israel struck Iran on February 28, an escalation that put the world’s busiest oil artery back at the center of the market. Crude had already climbed to multi-month highs in February as traders priced in the consequences of American strikes.
What looks like a blockade may not be one, according to the analysts watching it. “This appears to be driven by heightened tensions and precautionary decisions by ship operators and insurers rather than a confirmed physical blockade by Iran,” Jorge Leon, senior vice president for geopolitical analysis at Rystad Energy, wrote to clients. “From a market perspective, however, the distinction is secondary. Whether the Strait is closed by force or rendered inaccessible by risk avoidance, the impact on flows is largely the same.”
The Chokepoint, In Numbers
The strait runs between Oman and Iran, linking the Persian Gulf to the Arabian Sea. At its narrowest point it is just 33 kilometers wide, and the shipping lane is a mere 2 miles across in either direction. Figures from Vortexa, an energy and freight consultant, put flows at about 20 million barrels per day, carrying crude pumped by Saudi Arabia, Iraq, Kuwait and the United Arab Emirates to the world market. Qatar, a top exporter of liquefied natural gas, depends on the same corridor for nearly all of its LNG shipments. The US Energy Information Administration calls it the “world’s most important oil transit chokepoint.”
The exposure is concentrated in one direction. The EIA reckons 82% of the crude and fuel crossing the strait ended up with Asian buyers, with South Korea, Japan, India and China together taking nearly 70% of all crude and condensate flows. Those four importers sit first in line for any lasting disruption.
Why Closure Cuts Both Ways For Tehran
Iran has threatened to shut the strait repeatedly and has never followed through. The company logic, as experts note, is straightforward: Tehran needs the same corridor to ship oil to buyers such as China, and a true closure would invite a rapid international response while severing its own export line. A long shutdown would also strain the ties Iran has painstakingly rebuilt with Saudi Arabia and the UAE.
There is precedent for disruption without destruction. During the 12-day war between Israel and Iran last June, commercial shipping saw no major attacks, yet owners tightened security, some canceled routes, and interference with navigation systems surged across the Gulf, naval sources told Reuters.
The Bypass Math
Alternatives exist, but they are thin. Saudi Arabia’s East-West pipeline has capacity for 5 million barrels a day, and the UAE can move crude from onshore fields to Fujairah, an export terminal on the Gulf of Oman outside the chokepoint. The EIA figures around 2.6 million barrels per day could realistically bypass the strait. Against 20 million barrels of daily traffic, that is the number importers across Asia are now doing arithmetic on.
