
Swiss Re publishes a report on how El Niño, La Niña and neutral phases affect agricultural production and insurance portfolios. It cites the 1982-83 El Niño as the cause of the most intense maize yield failure on modern record.
The report is an insurance-sector reference and does not describe a new supply event. It reinforces that ENSO shifts are a material yield risk for crops.
After 445 past neutral weather events, Corn moved a median +0.1% over 5 sessions (52% higher; middle half -1.4% to +1.6%), and +0.7% over 20.
After 324 past neutral weather events, Soybeans moved a median +0.0% over 5 sessions (52% higher; middle half -1.4% to +1.7%), and +0.7% 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.