The North Dakota Grain Growers Association joined US commodity groups in a letter urging President Trump to act against Mexico's environment secretary, Victor Toledo. Toledo had called for a ban on biotech crops and suppression of pesticides, which the letter says could start a trade dispute.
A Mexican ban on biotech crops could cut US corn exports to Mexico, the largest market for US corn, which would weigh on corn prices if the threat becomes policy.
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.
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.