Background: Why the Sudden Discussion of an Embargo?
1. US diesel prices continued to surge in 2026. By late September, the national retail price of diesel had exceeded $6.50 per gallon, setting a nominal price record. The underlying supply shocks were mainly related to the Iran-Iraq War, supply disruptions related to the Strait of Hormuz, and Ukraine's attack on Russian refineries. Simultaneously, the US entered the agricultural harvest season, with farmers and the trucking industry experiencing particularly strong demand and price pressures on diesel. The US itself is a major global diesel exporter, with diesel exports reaching approximately 1.5 million barrels per day so far in 2026, an increase of approximately 275,000 barrels per day compared to the same period in 2025.
Key Timeline
1. September 17: US Republican Representative Tim Burchett from Tennessee introduced two bills: one proposing to extend the diesel export ban until January 2027; the other proposing to automatically trigger export restrictions when the national diesel price reaches $5 per gallon. (The debate over a "diesel export ban" at the congressional level has officially intensified.)
2. Around September 17: Senate Majority Leader John Thune indicated his willingness to study restrictions on diesel exports. (This indicates the discussion has expanded from individual senators' proposals to the top Republican leadership.)
3. September 19: Iowa Senator Chuck Grassley publicly demanded that Trump halt diesel exports; Interior Secretary Doug Burgum stated that an export ban would only be considered if it could genuinely lower prices. (Significant divisions began to emerge within the executive branch.)
4. September 21: Republican senators from agricultural states, including Grassley, Ashley Hinson, and Mariannette Miller-Meeks, further demanded a halt to diesel exports; diesel prices rose to approximately $6.51 per gallon. (Political pressure escalated significantly.)
5. September 22: During the UN General Assembly, Trump publicly stated, "I've called for that, too," indicating his own advocacy against diesel exports; Treasury Secretary Bessant stated that the government was studying the feasibility of a full or partial ban. (This is a key turning point: the president shifted from a cautious stance to publicly supporting the study of a ban.)
6. September 22: S&P Global analysis suggests that a complete ban on diesel exports could require US refineries to cut approximately 1.9 million barrels per day of crude oil processing, representing about 12% of total US refinery processing. (The market began seriously assessing the actual supply chain impact of the ban.)
7. September 23: Politico reported that the Trump administration was preparing a 90-day diesel export ban; following the news, US diesel futures fell significantly. (The market began trading on the expectation that the ban was imminent.)
8. September 23: White House officials denied that the US was preparing a 90-day diesel export ban; Energy Secretary Chris Wright also stated that no one was considering a blanket diesel export ban. (A clear distinction emerged between "preparing to implement" and "studying options.")
9. September 24 (Currently): The ban has not yet been officially announced; there are disagreements within the administration regarding its effectiveness. (The matter is still in the policy discussion stage.)
