The war in Iran is reshaping global oil markets in ways that are creating an unexpected windfall for American crude exporters — even as prices surge and supply chains buckle across the Middle East.
On Wednesday, the price gap between US West Texas Intermediate crude and the global Brent benchmark hit $12.05 a barrel — its widest discount since March 2015. The divergence is being driven by the conflict itself: attacks on Middle Eastern oil infrastructure have pushed Brent sharply higher, while a growing domestic supply glut is keeping WTI comparatively cheap. Brent rose 3.8% on Wednesday alone after Iran threatened to hit Gulf energy targets and its enormous South Pars gas field was struck in an attack. WTI, by contrast, barely moved, gaining just 0.1%.
That gap is wide enough to make it profitable for traders to ship American crude to Europe and Asia despite rising freight costs. Chartering costs for an Aframax tanker carrying up to 700,000 barrels from the US Gulf Coast to Europe jumped from $4.36 million before the war to around $6 million on Wednesday — a significant increase, but still not enough to close the arbitrage. “WTI looks extremely cheap in our arbs now and will go nicely to Europe,” said Neil Crosby, analyst at Sparta Commodities, adding that US crude loadings for export will likely rise sharply in the coming weeks.
Several factors are piling pressure on WTI specifically. IEA member countries have agreed to release 400 million barrels of crude from strategic reserves to try to cool prices, with the US putting in 172 million barrels from its Strategic Petroleum Reserve. At the same time, crude stocks at Cushing, Oklahoma — the key US pricing and delivery hub — rose last week to 27.52 million barrels, their highest level since August 2024. That build in inventory, on top of the reserve release, is weighing on the domestic price even as global benchmarks surge.
The dynamic won’t last indefinitely. If export demand rises fast enough to push freight rates even higher, the economics of moving American crude overseas could eventually become unworkable — closing the arbitrage window and capping how much oil actually leaves US shores. For now, though, traders are moving quickly to take advantage while they can.
