Strait of Hormuz Ship Traffic Reportedly Near Standstill, Raising China Energy Risk

What’s happening

Chinese outlet Huxiu (虎嗅) reports the Strait of Hormuz has been “nearly stagnant” for about a week, with only Iranian-flagged vessels transiting in the past 24 hours. It has been reported that public AIS ship-tracking shows a sharp thinning of movements through the chokepoint, though the precise causes remain unclear. The strait, which squeezes between Iran and Oman to connect the Persian Gulf with the Gulf of Oman and the Arabian Sea, is again in the spotlight amid heightened regional tensions.

Why it matters

The Strait of Hormuz is the world’s most critical oil transit chokepoint. By widely cited U.S. Energy Information Administration estimates, roughly a fifth of global petroleum liquids trade passes through it in normal times. Alternatives exist—but are limited. Saudi Arabia’s East–West pipeline and the UAE’s Abu Dhabi–Fujairah line can bypass part of the flow, but not all. Any sustained disruption tends to lift freight rates and war-risk insurance premiums and can harden benchmark crude spreads. Add the thicket of U.S. sanctions on Iran and a large “shadow fleet” of tankers with opaque ownership, and transparency dims further. If only Iranian vessels are moving, is everyone else waiting it out?

The China angle

China remains the world’s largest crude importer, and a large share of its barrels comes from the Middle East—Saudi Arabia, Iraq, the UAE, Kuwait, and Qatar—all of which typically load cargoes that exit via Hormuz. Prolonged slowdowns would ripple to state refiners such as Sinopec (中国石化), PetroChina (中国石油), and CNOOC (中国海油), and to carriers like COSCO Shipping Energy (中远海能). They can lean on diversified sourcing, including Russian grades and domestic inventories, but rerouting options are costly and finite. Can China’s refiners pivot fast enough if loadings or transits choke, or will they need to bid up alternative supplies?

What to watch

• Verification: Reportedly thin AIS signals may also reflect transponders being switched off; analysts will triangulate with satellite imagery and port loading data to confirm the pace of flows. Chinese and global EO/AIS providers, including commercial constellations operated by firms such as Chang Guang Satellite Technology (长光卫星), will be closely watched.
• Policy and security: Any shift in U.S.–Iran dynamics, naval escort policies, or regional escalation could quickly loosen—or tighten—the corridor.
• Market gauges: Brent–Dubai spreads, Oman/Dubai benchmarks, VLCC rates on the Arabian Gulf–China route, and war-risk premiums. A halt that extends beyond days into weeks would materially tighten Asia’s prompt supply.