
A cold air mass is forecast to bring a widespread frost to southern Brazil and Paraguay after a stalled front. Most of the safrinha corn in Parana is rated good to excellent, but only about 26% is mature, so the crop remains vulnerable.
The frost threat is larger than an earlier mid-May event.
Frost damage to late-maturing corn in southern Brazil could cut yields and tighten export supply, which is supportive for corn prices.
After 1,465 past bullish weather events, Corn moved a median +0.2% over 5 sessions (54% higher; middle half -1.4% to +1.9%), 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.