USDA’s October World Agricultural Supply and Demand Estimates delivered its biggest corn surprise in years. The national yield estimate rose to 181.2 bushels an acre, up 2.7 from September, when analysts had expected a small decline to around 177.6. The revision added about 234 million bushels to the crop, pushing projected 2026 production to 16.034 billion bushels, the second-largest on record behind 2025’s record harvest, and 2026-27 ending stocks to 1.849 billion bushels, 172 million above the average trade estimate and 282 million above September.
Corn futures fell more than 20 cents to an eight-week low, trading near 480 cents at the site table’s 7:00 AM check, down 4.1 percent on the day. The selloff unwinds the late-summer rally that had taken corn near three-year highs on fears extreme heat and rain in the Midwest had damaged crop potential. USDA’s numbers suggest the damage was less severe or less widespread than feared.
Soybeans moved less dramatically but still higher than expected. USDA raised the soybean yield to a record 53.1 bushels an acre from 52.8, against expectations it would hold steady, lifting production to a record 4.562 billion bushels, up 7.1 percent from 2025. Ending stocks rose 5 million to 315 million bushels, with exports raised 10 million on Chinese buying. Soybean futures initially sank on the report but recovered to end higher, sitting at 1292 cents in the morning table. US wheat carryover rose 23 million bushels to 740 million, and wheat slipped 1.79 percent to 671 cents.
The context frames the size of the shock. The September 30 quarterly Grain Stocks report had already shown corn stocks of 2.095 billion bushels, up 35 percent year over year and above every trade estimate, so the market knew it faced large supplies; the October yield increase layered on top. World ending stocks for 2026-27 also came in above trade expectations at 280.4 million tons for corn and 276.0 for wheat.
For livestock and ethanol buyers, the drop in corn is a margin opportunity; for farmers, it lands one day after USDA announced a record $13.8 billion in ARC/PLC safety net payments for the 2025 crop year, underscoring how much revenue protection has had to pay out this year. The forward watchlist is now physical: harvest pace, Brazil’s Conab report on October 15, and the November USDA Crop Production report, plus whether the post-report recovery in soybeans holds toward September levels.