Chicago December corn prices rose 6 dollars per tonne in late September to 213 dollars per tonne, driven by fund buying and tight world cereal supplies. Mexico confirmed its proposed GM maize import ban would not apply to feed maize, which accounts for most of its US imports.
China's grain bureau cut its 2021/22 corn import forecast to 20 Mt from the USDA's 26 Mt.
Mexico's clarification protects most US corn exports to Mexico, but the lower Chinese import estimate weighs on global demand and prices.
Not enough comparable past events yet for a historical read.
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.