Diesel prices have surged as the United States-Iran war, reduced global refining capacity and disrupted petroleum-product trade tighten supply. International diesel prices rose 76.1% to $163.56 per barrel from February 27 to September 1, compared with a 49.5% increase for gasoline to $119.03. U.S. retail diesel reached $4.71 per gallon, prompting President Donald Trump to meet executives from Chevron, ExxonMobil and other major oil companies to discuss market stabilization; the Financial Times reported that a ban on U.S. petroleum-product exports may be considered. The diesel crack spread, a measure of refinery margins, reached a record $106 per barrel. Refiners are benefiting, while South Korean companies are preparing to send more cargoes to Europe, where prices have risen above Asian levels.