
The Australian Bureau of Meteorology has declared La Niña conditions in effect, following the US Climate Prediction Center's declaration in late October. Models suggest the event will be brief, peaking around the new year and fading to neutral by spring in the Northern Hemisphere.
A confirmed La Niña points to drier conditions in Argentina and southern Brazil and a drier southern US, which can support soybean and corn prices if dryness materializes. The short expected duration limits the upside.
After 1,079 past bullish weather events, Soybeans moved a median +0.3% over 5 sessions (54% higher; middle half -1.4% to +2.0%), and +0.9% over 20.
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.