A sharply lower US corn production estimate has pushed corn to new contract highs, while wheat is supported by renewed Black Sea tensions and soybeans come under pressure from a record-yield outlook and weaker biofuel markets.
The global grain complex opens Monday, 24 August, with a sharply divided tone. Corn is leading the upside after a significantly lower US production estimate, wheat is rallying on renewed geopolitical and logistical risk, while soybeans and soybean oil are under pressure as stronger production expectations and softer energy markets offset solid Chinese demand.
Pro Farmer Corn Estimate Triggers a Sharp Repricing of US Supply
The biggest market-moving development is the post-tour estimate for US corn production at 15.344 billion bushels, with an average yield of 173.2 bpa. That is 669 million bushels below the August USDA forecast, while the yield estimate is well below USDA’s 180.7 bpa and would represent the lowest national yield in six years. The size of the gap forces the market to reassess how much supply may actually be available and gives corn a clearly bullish bias at the start of the week.
Corn Rally Is Increasingly Backed by Fund Positioning
Speculative money has moved aggressively into corn. Managed money held a net long position of 250,505 contracts as of 18 August after increasing exposure by 83,735 contracts in a single week through a combination of fresh buying and short covering. With prices moving sharply higher since then, positioning is likely even larger, which strengthens momentum but also increases the risk of volatility and profit-taking if the production narrative weakens.
Strong Old-Crop Corn Demand Adds Support to the Supply Story
Demand fundamentals remain supportive enough to magnify the production concern. Old-crop US corn commitments stand at 87.74 MMT, 24% above last year and equal to 102% of the USDA projection. New-crop sales remain 21.7% below last year at 11.391 MMT, but still represent the fourth-largest forward book since 2000. If production moves materially closer to the lower private estimate, the market may need higher prices to ration demand more aggressively.
Soybean Production Outlook Moves in the Opposite Direction
Soybeans are facing a very different supply signal. The national production estimate is placed at 4.572 billion bushels, with yield at 53.3 bpa, above the USDA’s 52.7 bpa and potentially a new record. Production at that level would provide additional supply cushion against improving demand and is therefore bearish relative to the much tighter corn outlook. The contrast between the two crop estimates explains much of this morning’s widening price divergence between corn and soybeans.
Chinese Buying Continues to Cushion Soybean Losses
Despite the more comfortable production outlook, demand is preventing a deeper soybean sell-off. China continues to accumulate US soybeans, while announced purchases total just over 6.5 MMT, with another 4.7 MMT booked to unknown destinations. New-crop commitments stand at 11.85 MMT, double the same period last year and the largest in four years. The demand picture remains constructive, but today it is being outweighed by the prospect of a larger US crop.
Soybean Oil Hit by Lower Energy and Biofuel Policy Uncertainty
Soybean oil is the weakest part of the oilseed complex this morning. WTI crude is down $1.70/barrel at $85.36, while gasoline and heating oil are also lower, reducing broader support from the energy complex. At the same time, expectations that the EPA may announce small refinery exemptions for 2026, potentially including a 30- to 90-day compliance extension, have pressured D4 renewable fuel credits and weakened biodiesel and renewable diesel margins. The combination is distinctly bearish for soybean oil and is adding indirect pressure to soybeans.
Black Sea Tensions Renew Support for Wheat
Wheat is benefiting from another escalation in Black Sea risk after a truce proposal covering shipping was rejected. Ukrainian grain exports in the week ending 19 August fell to just 188.2 thousand MT, down 11.5% from the previous week, highlighting how constrained regional trade flows remain. Russia also raised its wheat export tax by 40% to 1,012 roubles/MT, adding another supportive element by potentially increasing the cost of Russian supply to the international market.
Weak US Wheat Demand Still Limits the Bullish Case
The geopolitical premium is being tempered by poor US export performance. Sales for 2026/27 stand at 7.936 MMT, down 31% from last year and equal to only 38% of the USDA export projection, compared with 49% at the same point last year and a 45% average pace. That leaves wheat dependent on Black Sea disruptions and reduced competing supply for continued upside, rather than on strong underlying US demand.
Weather Is Not Offering a Major New Shock
Weekend rainfall across the US Midwest broadly matched expectations, while temperatures above 100°F were largely confined to the far southern Plains. The second-week outlook calls for normal to above-normal temperatures and normal precipitation across the central US, with drier conditions around the Great Lakes. Rain in central Europe should provide some drought relief, while South American rainfall remains concentrated in southern interior Brazil. For now, weather is less disruptive than the production estimates themselves, leaving crop-tour conclusions and geopolitical developments as the dominant price drivers.
Wheat Futures
Wheat is starting Monday sharply higher across all three US classes. Sep ’26 Chicago wheat is up 13 1/2 cents at $6.95/bu, Sep ’26 KC wheat is up 11 cents at $7.67 1/4/bu, and spot Minneapolis wheat is up 7 cents at $7.05/bu. The rally is being driven primarily by renewed Black Sea shipping risk, weak Ukrainian export flows and Russia’s higher export tax, while sluggish US export demand remains the main factor limiting the upside.
Corn Futures
Corn is the clear leader at the start of the week. Sep ’26 corn is up 12 1/2 cents at $4.96 1/4/bu, while Dec ’26 corn is up 13 1/2 cents at $5.22/bu. December has moved to a new contract high, while September has reached a 2 1/2-year high. The market is reacting directly to the 173.2 bpa yield and 15.344 billion bushel production estimate, with strong speculative positioning and robust old-crop demand reinforcing the bullish move.
Soybean Futures
Soybeans are moving lower against the broader grain strength. Sep ’26 soybeans are down 3 1/2 cents at $12.21 1/2/bu, while Nov ’26 is down 5 1/2 cents at $12.34/bu. Sep ’26 soybean meal is up $1.10 at $318.80, while Sep ’26 soybean oil is down 187 points at 67.48. The higher 53.3 bpa yield and 4.572 billion bushel production estimate are weighing on beans, while weaker energy prices and biofuel-policy uncertainty are adding pressure to soybean oil. Continued Chinese buying remains the key factor preventing a more pronounced decline.