Trump backs diesel export ban as diesel prices rise 75% year-on-year

Officials said President Trump supports a ban on diesel exports and that Treasury Secretary Scott Bessent said the idea is being explored. Data showed U.S. diesel prices were up 75% from a year earlier on September 23, 2026, a move that officials and traders say has sharpened interest in supply-side measures.

Diesel export ban raises US supply risk

Officials and market participants said a formal ban would remove barrels from the global pool, tightening available supply for buyers outside the United States. Traders said tighter physical markets would likely lift prompt-month refinery margins and could push futures higher as importers scramble for cargoes.

Officials noted that an export restriction would work through two channels: immediate reduction in outbound shipments and a near-term inventory draw as domestic demand competes with export commitments. Data showed U.S. refinery runs and stock levels will be watched closely; lower exports would amplify seasonal pressures ahead of winter heating demand.

Price and policy implications for markets

If the administration moves to a formal ban, markets will price a sustained supply shock; if it only signals restrictions without enforcement, the effect may be short-lived. Traders said basis and crack spreads would be the first indicators of sustained strain.

Markets will watch for any formal announcement or guidance from the administration by September 30, 2026, with traders prepared to reprice cargoes and prompt contracts if official steps are announced.