Iran Oil Exports Plunge over 90% as US Blockade Bites

Why It Matters

The steep export drop cuts Iran’s hard‑currency earnings and strains Chinese refineries dependent on sanctioned oil, reshaping regional energy dynamics.

Key Takeaways

• May sea exports fell 93%, to 2.01 million barrels.
• VLCC crude shipments dropped to zero, replaced by Panamax/Handymax vessels.
• Six Iranian tankers anchored at Malaysia’s EOPL for ship‑to‑ship transfers.
• 69 tankers remain inside U.S. blockade line, straining storage capacity.
• China’s “teapot” refineries face oil shortages as blockade persists.

Pulse Analysis

The United States’ maritime blockade, activated on 13 April 2026, has slashed Iran’s seaborne oil shipments by more than nine‑tenths. According to United Against a Nuclear Iran (UANI), May exports fell to 2.01 million barrels from 29.7 million the month before, a 93 percent plunge. The enforcement line that runs from eastern Oman to the Iran‑Pakistan border forces tankers to turn back, pushing Iran to rely on smaller Panamax and Handymax vessels for naphtha and limited LPG cargoes. VLCC crude runs, which once moved two‑million‑barrel loads, have vanished from the schedule.

The abrupt contraction reverberates beyond Tehran. China, which imports a sizable share of Iran’s “teapot” refinery feedstock, now sees its floating reserves stranded at Malaysia’s Eastern Outer Ports Limits (EOPL) and near Hong Kong, awaiting costly ship‑to‑ship transfers. UANI counted six Iran‑flagged ships at the EOPL and a total of 69 laden tankers trapped inside the blockade zone, creating storage bottlenecks on both sides of the Gulf of Oman. The scarcity of sanctioned crude is likely to push Chinese refiners toward alternative suppliers, tightening global oil markets.

The economic squeeze threatens two strategic partners. Iran’s hard‑currency earnings, a primary source of funding for the Islamic Revolutionary Guard Corps, are projected to evaporate as oil sits idle, while Beijing’s independent refineries confront supply gaps that could erode their competitive edge. Continued U.S. naval presence will depend on domestic political capital, yet the longer the blockade endures, the greater the incentive for Tehran to explore illicit overland routes or to negotiate a diplomatic de‑escalation. Market participants should monitor any shift in enforcement posture as a barometer for regional energy stability.