
USDA's October 9 WASDE raised the 2026 US corn yield to 181.2 bushels per acre, up 2.7 bushels from September and well above the trade average of 177.7. December CBOT corn closed at $4.7975 on report day, down 20.5 cents and at support not seen since mid-August.
A larger-than-expected US corn crop adds supply and points to lower corn prices, which lowers feed grain costs for buyers. The surprise also weighs on related feed ingredients such as DDGS.
After 1,102 past bearish report events, Corn moved a median -0.2% over 5 sessions (47% higher; middle half -1.8% to +1.3%), and +0.0% over 20.
Not enough comparable past events yet for a historical read.
Moves of each commodity's benchmark from the last close before the event. Historical reads pool past events of the same kind; they describe what happened, not what will. Not investment advice.