
USDA's September WASDE cut the national corn yield to 186.7 bushels per acre from August's 188.8 and lowered soybean yield to 53.5 bu/acre. Both yields came in above average analyst estimates, and 2025-26 ending stocks also beat expectations.
Yield cuts tighten supply, but production and stocks still exceeded trade estimates, so the net effect is limited and feed grain prices face mixed pressure.
After 770 past neutral report events, CORN moved a median +0.2% over 5 sessions (54% higher; middle half -1.1% to +1.6%), and +0.7% over 20.
After 563 past neutral report events, SOY moved a median -0.1% over 5 sessions (48% higher; middle half -1.7% to +1.6%), and -0.1% over 20.
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.