Corn and wheat prices have climbed to their highest levels in more than three years, but the factors driving the recent rallies differ significantly between the two agricultural commodities.
Wheat futures settled 3.1% higher at 784 cents per bushel on Friday after reaching 790.25 cents, the highest level since February 2023. Wheat prices gained 12.1% during the week, marking their strongest weekly increase since March 2022, and have risen more than 54.5% year to date amid escalating tensions between Russia and Ukraine in the Black Sea region.
Corn futures also moved higher, settling at 536.5 cents per bushel after reaching 541.25 cents, the highest level since July 2023. Corn gained 5.5% during the week and has risen 21.8% year to date, supported by concerns over U.S. supply levels, strong demand, and reduced Ukrainian exports.
U.S. Corn Supply Concerns Drive Recent Rally
Corn’s recent price increase has been largely driven by growing concerns about the size and quality of the U.S. crop, while ongoing disruptions to Ukrainian exports have added additional pressure to global supplies.
William Osnato, director of commodity data research and analysis at Barchart, said market expectations shifted throughout August as traders increasingly believed available supply would be lower than previously projected.
The U.S. Department of Agriculture’s August World Agricultural Supply and Demand Estimates report reduced its corn yield forecast by 2.3 bushels per acre to 180.7, despite still projecting the second-largest harvest on record.
Additional concerns emerged after observations from the Pro Farmer Crop Tour showed that extreme July heat affected crop conditions following excessive rainfall across several U.S. growing regions.
Although the peak growing period has passed, weather conditions can still affect yields late in the season. Excess rainfall in parts of the eastern Corn Belt and the development of fungal diseases have added uncertainty around final production levels.
Tighter Global Corn Supplies Add Market Pressure
Jim McCormick, co-founder and chief operating officer at AgMarket.Net, said concerns about U.S. production have become more significant because global inventories were already limited.
“We thought the world was going to be bailed out by the U.S. supply. Now the U.S. supply is becoming questionable,” McCormick said, noting that the market has shifted toward a rationing environment.
European corn production has also faced pressure due to extreme heat and drought conditions throughout the summer. Increased demand from Europe, combined with constrained Ukrainian exports, has contributed to tighter global availability.
The USDA increased its U.S. corn export forecast by 75 million bushels to 3.3 billion, reflecting stronger global demand and reduced competition from Ukraine.
Wheat Prices Rise Due to Black Sea Export Disruptions
Unlike corn, wheat’s recent rally has been primarily driven by concerns about global supply disruptions.
Russia and Ukraine together account for more than a quarter of global wheat exports, making the Black Sea region a critical part of the international grain market.
Escalating tensions, damage to export infrastructure, and attacks affecting shipping routes have raised concerns that Russian wheat shipments could decline significantly.
Russia remains the world’s largest wheat exporter and an important low-cost supplier, but challenges in the Black Sea have made transportation more difficult and increased uncertainty for global buyers.
“What moves the market is a change in expectations,” Osnato said, explaining that reduced export capacity from the region has changed supply forecasts.
Weather Conditions Add Further Pressure on Wheat Supply
Weather-related challenges have also affected wheat production. Severe heat across Europe reduced output by an estimated 8 million to 10 million tons, while drought conditions lowered hard red winter wheat production in Texas, Oklahoma, and Kansas.
Reduced corn availability could also influence wheat markets, as lower corn supplies may encourage greater use of wheat as animal feed and reduce the amount of wheat available for export.
Commodity Momentum Attracts Additional Buying
Beyond supply and demand fundamentals, the move to multi-year highs has attracted additional interest from momentum-based traders and systematic investment strategies.
When commodity contracts reach new highs, both fundamental investors and algorithmic traders often increase their market participation, creating additional buying pressure.
With supply concerns affecting both crops, corn and wheat markets are entering a period where weather developments, geopolitical risks, and global trade conditions will remain key factors influencing prices.