
NASS data showed Iowa's 2017 corn yield averaged 202 bushels per acre and soybeans 56.5 bushels, the state's second biggest crop ever. Southern Iowa suffered drought and weather losses in several counties.
A large Iowa harvest adds to ample US supplies, a bearish factor for feed grain prices, though local losses in southern Iowa were limited.
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.
After 788 past bearish report events, Soybeans moved a median -0.3% over 5 sessions (47% higher; middle half -2.0% to +1.5%), and -0.9% 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.