Grains Firm Ahead of Trump-Xi Summit as Harvest Pressure Meets Record Diesel Costs
Chicago soybeans, corn and wheat all rose on Monday as traders positioned for the Trump-Xi summit in Washington, but US harvest is running ahead of the five-year average and diesel has hit a record $6.29 a gallon, squeezing farm margins at the heaviest fuel-use point of the year.
Most-active soybeans gained 0.6% to $13.11-3/4 a bushel, wheat rose 1.1% to $7.22-1/4 and corn advanced 1% to $5.33-1/4 by 1132 GMT on Monday, according to Investing.com. Wheat gained after drone attacks by Ukraine and Russia lowered expectations for a near-term end to a conflict that has largely halted Black Sea grain exports from both countries. The immediate focus is the Trump-Xi meeting in Washington, with the White House having announced in May that China agreed to buy at least $17 billion of US agricultural products in each of 2026, 2027 and 2028. Barchart frames the summit as putting agriculture, energy and tariffs directly back into the commodity-market spotlight at the same moment harvest supply is arriving.
Supply is now landing faster than the seasonal norm. Friday's session had already seen December corn settle down 3 cents at $5.27-1/2 and November soybeans down 16-1/4 cents at $13.03-1/2 as traders booked profits after multiyear highs. USDA reported 8% of the US corn crop harvested against a five-year average of 6%, with about 42% matured versus a 38% average, and roughly 6% of soybeans harvested against a 3% average. Demand is absorbing part of it: US corn export sales for the 2026/27 marketing year totalled about 1.03 million metric tons in the latest reporting week, and private exporters reported a further 111,000 metric tons of soybeans sold to China. Brazil remains the other half of the equation, with Conab forecasting production of about 180.4 million metric tons and record exports of 116.2 million tons.
The cost side is where the risk sits. US diesel has reached a record $6.29 a gallon, according to Reuters, as disruptions tied to the Iran conflict and attacks on energy infrastructure tighten global refined-fuel supplies, and farmers are entering harvest at precisely the point when fuel consumption is highest. That compounds an input bill that already rose sharply earlier in the year on nitrogen and phosphate fertiliser, and it means stronger grain futures do not translate one-for-one into margin. Barchart describes the corn market as having moved from weather-driven speculation to a contest between harvest supply and demand growth, with local basis levels deciding how aggressively elevators, ethanol plants, feedlots and exporters compete for physical grain. For soybeans, China remains effectively the entire market until the summit either delivers additional purchases or disappoints.