
A presidential decree in Mexico will phase out glyphosate use and GM corn cultivation, and the government has clarified that GM corn imports will end within three years. The ban covers yellow corn mainly used for livestock feed, not only food corn.
U.S. exports to Mexico have risen about 400% under NAFTA, mostly GM yellow dent corn.
A phase-out of GM yellow corn imports removes a key feed-grain market for U.S. corn, which is bearish for corn prices.
After 310 past bearish policy events, CORN moved a median +0.3% over 5 sessions (54% higher; middle half -1.4% to +1.9%), and +0.6% 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.