
Russia's ban on transit of Ukrainian goods in winter 2016 cut Ukraine's exports to Central and East Asia by 40 percent. Ukraine has shifted to a longer route via the Black Sea, Georgia, and the Caspian Sea.
Rerouted Ukrainian exports cost more and take longer, which can raise freight costs and reduce competitiveness for grain and oilseeds shipped east. The effect on global prices is limited.
Not enough comparable past events yet for a historical read.
After 38 past neutral geopolitics events, Wheat (SRW) moved a median +0.1% over 5 sessions (53% higher; middle half -1.6% to +1.5%), and +0.8% over 20.
After 31 past neutral geopolitics events, Corn moved a median -0.3% over 5 sessions (42% higher; middle half -2.3% to +1.1%), and +0.2% 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.