
Russia's withdrawal from the Black Sea grain agreement sent second-month wheat futures up 8.2% and corn up 2.3%. Prices eased after Russia said it would stay in the deal, and dryness in North and Latin America plus flooding in Australia added to supply concerns.
Threats to Black Sea export flows and weather-related crop losses tighten global wheat and corn supplies, raising feed grain costs for buyers.
After 361 past bullish geopolitics events, Wheat (SRW) moved a median +0.7% over 5 sessions (58% higher; middle half -1.4% to +3.7%), and +1.3% over 20.
After 323 past bullish geopolitics events, Corn moved a median +0.5% over 5 sessions (57% higher; middle half -1.5% to +2.9%), and +0.9% 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.