U.S. Sanctions on Iran’s Oil: Impact on China and Global Energy Markets

U.S. Sanctions on Iran’s Oil: Impact on China and Global Energy Markets

On August 24, U.S. Treasury Secretary Scott Bessent announced a so‑called "economic D-Day" targeting countries that purchase Iranian oil, a move that single out China because it accounts for roughly 90% of Iran’s exported oil. While no country was explicitly named, Bessent made it clear that the intent is directed at China, which the Treasury has warned it will not tolerate.

Why China Matters

China, as the world’s largest energy consumer, has historically relied heavily on Iranian crude to meet its refinery demand. With Iranian shipments falling from 1.4 million barrels per day in early 2025 to about 700k barrels today, China is still holding significant crude inventories, but the reduced imports raise concerns about long‑term security and potential cost shocks.

Global Ripple Effects

The sanction threat could reverberate beyond China. U.S. tariffs on Iranian petroleum are likely to tighten supply chains, especially through the Strait of Hormuz, where 38% of China’s oil and 23% of liquefied natural gas transit. Analysts point out that the Strait remains partially blocked, with shadow fleets concealing real traffic levels.

Economic Fallout for U.S. Consumers

American gas prices have already climbed to an average of $4.10 a gallon, up from $3.15 last year, driven in part by supply‑chain strains. The Treasury’s message is that no country is immune and that enforcement will continue indefinitely, creating uncertainty for global energy markets.

Political Tensions and Trade Wars

The U.S. and China have recently revived a tit‑for‑tat cycle of sanctions and trade barriers, reminiscent of the 2018 trade war under President Trump. The new sanctions target Iran’s ability to finance its military, with the U.S. also expanding sanctions on entities that facilitate Iranian trade.

While the full extent of the impact remains uncertain, analysts suggest a sharp rise in oil prices and further geopolitical wrangling as the U.S. pushes for compliance.

Source: CNN