Cash bids for corn, sorghum and soybeans fell from Sept. 17 to Sept.
18 while wheat was mostly higher, per the National Grain Market Summary. The move followed a US announcement of new 10% tariffs on $200 billion of Chinese goods, rising to 25% on Jan.
1, 2019, with a threatened further $267 billion in tariffs if China retaliates.
New tariffs on Chinese imports, including many farm items, cut export demand for US feedgrains and soybeans and pressure cash and futures prices. Wheat held up better because it was less exposed to the trade dispute.
After 683 past bearish trade events, Corn moved a median -0.2% over 5 sessions (47% higher; middle half -1.7% to +1.6%), and +0.3% over 20.
After 803 past bearish trade events, Soybeans moved a median +0.0% over 5 sessions (51% higher; middle half -1.7% to +1.7%), and +0.9% over 20.
Not enough comparable past events yet for a historical read.
After 206 past neutral trade events, Wheat (SRW) moved a median +0.1% over 5 sessions (53% higher; middle half -1.3% to +1.6%), and +0.5% 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.