The USDA's November supply and demand report cut the US corn yield to 179.6 bushels per acre from 181.2, lowering the crop to 15.89 billion bushels and carryout to 1.758 billion bushels. It raised the soybean yield to 53.3 bushels per acre, lifting the crop to a record 4.574 billion bushels, but cut soybean ending stocks to 300 million bushels.
A smaller corn crop and lower carryout tighten the US corn balance, though the USDA's cash corn price forecast fell 10 cents to $4.60. Soybean ending stocks near 300 million bushels are a level that tends to see rationing, which supports soybean prices even with the larger crop.
After 1,051 past bullish report events, Corn moved a median +0.6% over 5 sessions (62% higher; middle half -0.9% to +2.0%), and +0.8% 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.