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Reuters reported on August 10 that US ultra-low sulfur diesel futures jumped 7.4 percent to settle at $4.19 a gallon, recording the largest single-day gain since July 13. European diesel refining margins, calculated as the spread between fuel and crude oil costs, increased by nearly 10 percent the same day. The moves reflected immediate market reactions to physical supply risks stemming from the refinery strikes, which added to existing bottlenecks in refined product availability.
The rally unfolded as US distillate inventories, encompassing diesel and heating oil, stood at 107.2 million barrels as of July 31. US Energy Information Administration data placed that level as the lowest for the time of year in three decades. Tight stocks left the market vulnerable to further volatility, particularly with seasonal demand patterns exerting additional pressure.
US Energy Information Administration assessments have projected distillate inventories to finish 2025 and 2026 at multiyear lows, driven by refinery closures, robust export demand and steady domestic consumption. Those forecasts, issued in the agency’s Short-Term Energy Outlook, underscore structural constraints that predate the latest attacks yet amplify their impact. Recent weekly draws have kept inventories well below five-year averages, according to the same official tallies.
Reuters noted that the price spike raises particular concerns for farmers during the Northern Hemisphere planting season and the Southern Hemisphere harvest period. Diesel powers much of the heavy machinery used in those operations, and sustained higher costs could elevate overall agricultural expenses. The fuel also supports trucking and logistics networks that move crops and inputs across both regions.
European margins have responded in tandem with transatlantic supply linkages, where US exports often help balance regional deficits. Reuters data showed the margin expansion occurring alongside broader tightness in global distillate markets. Attacks on Russian facilities have curtailed some export volumes, while the Saudi incident further constrained processing capacity at a time when maintenance schedules already limited output.
The US Energy Information Administration has highlighted that lower inventories elevate risks of price volatility during peak demand windows such as autumn harvests and winter heating. Its earlier projections accounted for declining domestic refining capacity, a trend that has reduced buffer stocks even as consumption held firm. Combined with geopolitical disruptions, those dynamics have pushed diesel prices to outpace movements in benchmark crude during recent trading sessions.
