Corn and soybeans gain ahead of Friday’s USDA production update as traders position for lower US yields and stocks, while continued Black Sea disruption keeps wheat supported despite competing global supply signals.
Global grain markets start Thursday, September 10, on a firmer footing ahead of Friday’s USDA production and WASDE updates. Corn and soybeans are supported by expectations for lower US production and ending stocks, while wheat remains sensitive to continued attacks on Black Sea infrastructure and another reduction in Russia’s export outlook. Higher energy prices add macro support, although expanding South American supply and large speculative positions remain important counterweights.
Friday’s USDA Reports Move to the Center of the Market
Positioning ahead of Friday’s USDA production and WASDE updates is becoming the dominant short-term driver. Market expectations point toward lower 2026 corn and soybean production and tighter new-crop inventories, while relatively little change is anticipated for wheat. With prices already responding to tighter balance-sheet expectations, any meaningful deviation from current trade estimates could trigger a sharp move across the grain complex.
Corn Traders Expect a Meaningful Cut to US Production
Expectations for the US corn crop have tightened substantially. Market estimates place production near 15.777–15.785 billion bushels, well below the August USDA figure of 16.013 billion, while the average yield is expected around 178.1–178.2 bpa, down from 180.7 bpa. New-crop ending stocks are also expected to fall sharply, with estimates around 1.511–1.528 billion bushels, keeping the underlying corn balance supportive despite the approach of harvest.
Corn Faces Growing Competition From Argentina
The bullish US production story is being tempered by aggressive South American competition. Argentine exporters expect to ship 10 MMT of corn during August and September, more than double last year’s volume, as Argentine prices remain well below US and Brazilian FOB offers. The Rosario Grain Exchange also raised its 2026/27 planting estimate by 200,000 hectares to 10.6 million hectares, although this remains 3.6% below last year. Strong Argentine availability is therefore a bearish counterweight to tightening expectations in the US.
Brazilian Corn Exports Are Expected to Slow
Brazil provides a different export signal. September corn shipments are expected at only 5.2 MMT, well below 6.98 MMT in September 2025, potentially reducing competition from Brazil at a time when Argentine exports are accelerating. Meanwhile, Argentina’s 2026/27 crop is estimated in a range of 67.5–70.5 MMT, above the previous 66 MMT estimate, keeping the longer-term South American supply outlook more comfortable.
Soybeans Rally as Traders Price Tighter US Stocks
Soybeans are receiving stronger support ahead of the USDA update. Market expectations place US production around 4.492–4.501 billion bushels, below the August USDA estimate of 4.519 billion, with the yield expected around 52.4–52.5 bpa versus 52.7 bpa previously. New-crop carryout is projected around 291–298 million bushels, leaving the market with little room for additional yield deterioration if demand remains strong.
Chinese Buying Keeps Demand Firm Beneath Soybeans
Fresh Chinese demand continues to reinforce the bullish soybean balance. Another 272,000 MT of 2026/27 US soybeans were sold to China, alongside 206,500 MT to unknown destinations, while total Chinese purchases of US beans are estimated at 12–13 MMT. With higher new-crop demand already tightening the outlook, any USDA yield reduction would increase the risk of substantially lower stocks and stronger prices.
Large Speculative Length Leaves Soybeans Vulnerable to Fast Reversals
The supportive soybean fundamentals are accompanied by increasingly crowded speculative positioning. Long positions in soybeans and soybean meal remain at or near record levels, while the soybean oil long at 105,000 contracts is historically large. This positioning can amplify further gains if Friday’s USDA figures are bullish, but it also raises liquidation risk if production or stocks come in above expectations.
Black Sea Disruption Continues to Support Wheat
Wheat remains supported by persistent uncertainty around Black Sea logistics. Russia and Ukraine continue to target port infrastructure, and a Ukrainian drone attack on Russia’s Novorossiysk port damaged a grain terminal. Russia’s 2026/27 wheat export forecast has been lowered by another 3.2 MMT to 41.4 MMT, compared with the USDA estimate of 46 MMT, while September shipments are expected at around 2 MMT. These constraints keep global buyers sensitive to further disruptions and provide underlying support to wheat prices.
Larger Argentine Wheat Supply Caps Some of the Black Sea Premium
The wheat market is not uniformly bullish. Argentina’s 2026/27 wheat production estimate has been raised by 0.5 MMT to 21 MMT, matching the current USDA figure, while the EU wheat crop estimate has been reduced by 0.7 MMT to 126.1 MMT and the export projection increased by 0.8 MMT to 29.5 MMT. Stronger Argentine supply therefore provides some offset to weaker Russian exports and tighter European production.
Heavy Midwest Rain Could Slow Early Harvest
Weather remains supportive for corn and soybeans from a timing perspective. Heavy precipitation has shifted south across the US, with a band of rain stretching from Kansas into the Northeast, while further rainfall is expected across the central Midwest and eastern Corn Belt over the next week. The wetter pattern could slow crop maturation and early harvest activity, while above-normal precipitation is expected across much of the central US in the second week of the outlook.
Higher Energy Prices Add Another Supportive Macro Layer
Energy markets continue to strengthen as Middle East tensions remain elevated. Spot WTI crude is up $2.60/barrel near $98.60, reaching another contract high, while RBOB gasoline is up $0.06/gallon and heating oil is $0.04 higher. The US dollar is slightly firmer ahead of producer-price data, with August PPI expected to rise 0.3% month over month and 5.3% year over year, leaving energy supportive for agricultural markets while the currency provides a modest counterweight.
Wheat Futures
Wheat starts Thursday modestly higher in two-sided trade, with continued Black Sea disruption supporting prices while larger Argentine production and expectations for limited changes to the US wheat balance cap the upside. Dec ’26 Chicago wheat is up $0.03 1/2 at $7.32 1/4/bu, Dec ’26 Kansas City wheat is up $0.01 1/2 at $8.07 3/4/bu, and Dec ’26 Minneapolis wheat is up $0.02 at $7.50/bu. Russia’s reduced 41.4 MMT export forecast and damage to the Novorossiysk grain terminal remain the principal supportive factors heading into Friday’s USDA update.
Corn Futures
Corn begins Thursday higher, with Dec ’26 futures up $0.04 at $5.32/bu, while remaining inside Wednesday’s trading range and above near-term support at $5.26 1/2. Expectations for US production to fall toward 15.785 billion bushels and ending stocks toward 1.528 billion provide fundamental support, although large speculative traders have been net sellers for four consecutive sessions and have reduced their long position to just below 400,000 contracts. Strong Argentine export competition remains another limiting factor ahead of Friday’s USDA figures.
Soybean Futures
Soybeans lead the row crops higher, with Nov ’26 soybeans up $0.09 at $13.18 1/2/bu, Oct ’26 soybean meal up $1.90 at $347.00, and Oct ’26 soybean oil up 15 points at 70.23. Crush margins are down $0.04 at $2.36/bu, while soybean oil’s share of product value has slipped back below 50%. Expectations for lower US production and stocks, another 272,000 MT sale to China and estimated Chinese purchases of 12–13 MMT keep the fundamental bias supportive, although near-record speculative length leaves the market vulnerable to a sharp reaction around Friday’s USDA reports.