Corn Prices Dip as South American Supplies Bolster Global Markets

Corn futures have taken a step back after a brief rally, as traders took profits in response to fresh estimates of South American crop yields and improved US Midwest rain forecasts.

The USDA recently predicted one of the largest US harvests on record, citing larger planted acreage that can offset weaker yields. However, overseas projections are also growing, with Argentina's Rosario Board of Trade now expecting a record 70.5 million metric tons of corn in the 2025-26 crop year.

Brazil's crop agency Conab has also lifted its total corn forecast to a record 143 million tons. This surplus supply is shifting real buying decisions, as global importers can substitute away from US cargoes and cap US prices. Solid US export sales can coexist with softer prices because the marginal demand is there, but fallback options are too.