A GRAIN report cites an August 2017 study by UNAM and UAM researchers that found transgenes in 82% of 367 processed food and corn product samples in Mexico, including 90.4% of tortillas tested. The same study detected glyphosate in nearly one-third of the transgene-positive samples.
The report frames the findings as a food sovereignty and health concern.
The findings add pressure on Mexican food-safety and GMO-labeling policy, which could affect demand for US biotech corn over time. The near-term price effect is minimal.
After 439 past neutral policy events, CORN moved a median +0.1% over 5 sessions (51% higher; middle half -1.3% to +1.2%), and +1.1% 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.