Chicago corn futures rose 4% to about $151.8/t after the US-China phase one trade agreement was announced, which cancelled the December 15 tariff increase and reduced existing duties. Weekly US corn export sales rose but remained well below last year's pace, and Argentina's export suspension and higher duty were cited as supportive.
Lower US-China tariffs and Argentina's export restriction support corn prices by improving export demand expectations. Lagging US export sales limit the upside.
After 729 past bullish trade events, Corn moved a median +0.4% over 5 sessions (56% higher; middle half -1.1% to +1.8%), and +0.5% over 20.
After 696 past bullish trade events, Soybeans moved a median +0.3% over 5 sessions (54% higher; middle half -1.3% to +1.9%), and +0.7% 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.