A minority staff report from the Joint Economic Committee estimates US farmers spent about $1.4 billion more on diesel during the 2026 planting season, a 63 percent increase from last year, when planting corn, soybeans, wheat, cotton and rice. The report links the higher diesel prices to US military action against Iran and attributes added farm costs to the administration's tariff policies.
Higher diesel and input costs squeeze farm margins and can reduce planted acreage and feed-grain supply, while tariffs disrupt export demand, which together weigh on feed-related price outlooks.
After 109 past bullish report events, DIESEL moved a median +0.2% over 5 sessions (51% higher; middle half -3.3% to +3.9%), and +0.3% over 20.
After 768 past neutral report events, CORN moved a median +0.2% over 5 sessions (54% higher; middle half -1.1% to +1.6%), and +0.7% over 20.
After 563 past neutral report events, SOY moved a median -0.1% over 5 sessions (48% higher; middle half -1.7% to +1.6%), and -0.1% over 20.
Moves of each commodity's benchmark from the last close before the event. Historical reads pool past events of the same kind; they describe what happened, not what will. Not investment advice.