Russia will raise its wheat export duty to about $6/t from September 17, 2025. UK and Chicago wheat futures rose on the news and on short covering, and 67% of US corn was rated good or excellent.
A higher Russian export duty raises the cost of Russian wheat in world markets, which supports global wheat prices unless Russian sellers cut prices to offset it.
After 182 past bullish policy events, Wheat (SRW) moved a median +0.1% over 5 sessions (52% higher; middle half -1.9% to +1.4%), and -0.3% over 20.
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.