Brent crude flips to backwardation amid Iran supply fears

Brent crude futures swung into their steepest backwardation in more than a month on Tuesday as renewed hostilities between the United States and Iran again threatened to choke off oil shipments through the Strait of Hormuz, the world's most critical energy chokepoint.

The front-month Brent contract traded $8.92 per barrel above the sixth-month contract on July 14, its largest premium since June 10, according to Reuters. The shift in the futures curve — known as backwardation — is typically read as a sign that traders expect near-term supplies to remain tight relative to demand.reuters+2

Hormuz Disruptions Return

The structural change followed a week of escalating tensions in the Persian Gulf. Iran struck three commercial vessels near the Strait of Hormuz on July 7, according to CNN, which cited a U.S. official who described the attacks as a breach of the existing memorandum of understanding between Washington and Tehran. By July 8, shipping in the strait had come to a "near-standstill," stranding some 6,000 seafarers aboard hundreds of vessels, the International Maritime Organization reported.cnn+1

On July 12, U.S. Central Command announced fresh strikes against Iranian targets aimed at stopping attacks on commercial shipping, while President Trump declared the United States would "take over" the Strait and impose a 20 percent fee on all cargo transiting the waterway.nbcnews+1

Broader Market Tightness

The supply anxiety extended beyond Brent. As recently as July 7, Saxo Bank commodity strategist Ole Hansen noted that the Brent prompt spread had swung from a 40-cent contango to around 60 cents of backwardation as the Iran ceasefire unraveled. By Tuesday, that spread had widened dramatically as traders repriced the risk of prolonged disruptions to Gulf exports.home

Middle East benchmarks including Oman, Dubai, and Murban crude had swung from discounts to premiums, reflecting broad concern over near-term availability in a region that supplies roughly a fifth of global oil.finance.yahoo+1

Adding to the tightness, U.S. distillate inventories were already projected to end 2025 and 2026 at multi-year lows, according to the Energy Information Administration, driven by refinery closures and strong export demand. Hansen has flagged diesel shortages as the real stress point in energy markets, noting that refined fuel inventories — not crude — represent the binding constraint.ogj+2

The combination of physical supply disruptions, geopolitical uncertainty, and depleted product inventories leaves crude markets on edge heading into the peak summer demand season.