Grains: Wheat, Corn and Soybeans Daily — 2026-10-04

Top developments

U.S. Soybeans Plunge on Drier Midwest Outlook and Fund Liquidation

Soybean futures fell to five-week lows this week amid forecasts for drier Midwest weather that will accelerate harvest progress, and large fund liquidation. November soybeans closed Thursday at $12.93, down 4¾ cents, with traders shifting focus "directly to yields and demand" as harvesting activity picks up. Blue Line Futures noted that funds were in "liquidation mode" across soybeans with spillover weakness in corn, pushing November contracts below $13.

Russian Grain Export Collapse: 14–20 Million Tonnes Stranded by Black Sea Port Outages

Russia faces a catastrophic grain export crisis as Black Sea port disruptions leave 14–20 million tonnes of wheat and corn unable to reach markets. Pro-Zernovoy analysts warned that Russia cannot realize its export potential for the 2026/27 season, with September wheat shipments forecast to fall to 1.8–2.3 million tonnes—the lowest level since 2010. Southern Russian wheat prices have collapsed 42% due to port closures caused by drone strikes on Azov Sea and Black Sea terminals. This blockade is now driving global commodity prices to their highest levels since the Ukraine war began in 2022, with ripple effects across CBOT and international grain markets.

USDA Corn Stocks Surprise; StoneX Lowers Yield Forecast

The USDA's larger-than-expected quarterly U.S. corn stocks figure triggered selling pressure on December corn contracts, which fell 2¾ cents to $4.99½ per bushel by Thursday. StoneX lowered its 2026 U.S. corn yield estimate to 182.1 bushels per acre from 182.9, citing improved Midwest weather conditions that will support faster harvest advancement. December CBOT wheat, meanwhile, rose 3 cents to $6.85¾, holding near six-week lows.

Argentina Posts Record September Wheat Exports; Soybean Demand at 7-Year Highs

Argentina shipped 1.05 million tonnes of wheat in September—23% above year-ago levels and more than double the five-campaign average—according to the Bolsa de Comercio de Rosario. Cumulative wheat exports for the 2025/26 cycle now exceed 16.2 million tonnes. External soybean demand for Argentine crushings reached seven-year highs, reflecting strong global appetite amid Black Sea supply fears. Wheat prices in Rosario rose 41% year-over-year, driven by geopolitical risk and tight global stocks.

Brazil: Corn Exports Below Seasonal Norms; Second-Crop Harvest Nears 100%

Brazil's corn exports in September logged 4.6 million tonnes—down 25.7% from the daily average—as the 2025/26 second-crop harvest neared completion at 99.5% according to Conab. First-crop corn planting for 2026/27 reached only 29.1%, with prices supported domestically by falling Chicago quotations and lower freight costs providing relief to poultry and hog producers facing margin pressure. Soybean prices fell in Chicago as U.S. harvest advanced and internal Brazilian processing decelerated.

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Local view

AgriMídia (Brazil) reported that falling Chicago corn prices and reduced freight costs are easing the cost burden on Brazilian poultry and swine producers, with Conab market intervention also reducing pressure on animal-feed margins.

CNN Brasil highlighted how U.S. harvest acceleration and internal processing slowdown are depressing soybean prices despite strong external demand signals from China and other Asian importers.

RFI (Russia/Ukraine Service) documented Russian military strikes on Ukrainian Odesa port facilities, warning that continued disruptions threaten both Ukrainian farmer incomes and global grain supply stability—with international vessels now steering clear of the Black Sea corridor.

Context & numbers

CBOT Settlement Levels (as of Thursday, Oct. 2):

• December wheat: $6.85¾ per bushel (up 3 cents Thursday, near six-week lows)
• December corn: $4.99½ per bushel (down 2¾ cents Thursday)
• November soybeans: $12.93 per bushel (down 4¾ cents Thursday, five-week lows)

U.S. Wheat Export Sales: Sales exceeded expectations at 817 million bushels for 2026/27 to date (nearly double year-ago), with China leading at 589,400 MT, including 176,000 MT switched from "unknown destinations."

Brazil Corn Exports (September 2026): 4.6 million tonnes, down 25.7% from daily seasonal average; second-crop harvest at 99.5% complete; first-crop planting at 29.1%.

Argentina Wheat Shipments (September 2026): 1.05 million tonnes, up 23% year-over-year; cycle-to-date 2025/26 total exceeds 16.2 million tonnes. Wheat prices in Rosario up 41% year-over-year.

Russia's Export Crisis: September wheat exports forecast at 1.8–2.3 million tonnes (lowest since 2010); 14–20 million tonnes of grain stranded by port closures; southern Russian wheat prices down 42%.

On the radar

• WASDE Report — Oct. 9, 2026: The next USDA supply and demand update will reassess global grain balances in light of accelerating North American harvest, Russian supply shocks, and Chinese buying patterns.

• Midwest Weather Shift: Cooler temperatures and wet conditions expected next week could slow harvest pace and support futures prices, particularly for corn and soybeans. Monitor NOAA/National Weather Service daily forecasts.

• China Soybean Demand: External demand for Argentine soybean crushings near seven-year highs; watch for additional Chinese import tenders and port-arrival data in coming weeks.

• Rumor Watch: Some market chatter suggests Russia may attempt alternative export routes via Caspian or rail corridors, but logistics costs would add 15–25% to landed prices, limiting competitiveness.