r/Commodities • u/cot-trader • 40m ago
El Niño is at its strongest July-September reading since 1950 - I checked what that has meant for corn belt drought, USDA yields and prices over 17 seasons
There's a lot of talk about El Niño at the moment, so I lined up ENSO, the US drought score, the USDA yield estimate and the corn price for the seasons 2010-2026.
Where we are: the July-September ONI is +2.16, the highest for that season since 1950. On NOAA's relative index it reads 1.7, second behind 1997 (1.8). CPC's October update gives an 83% chance of a historic event in Oct-Dec.
What the data say:
Spring El Niño and summer drought: in the 4 of 17 seasons with a spring El Niño, the corn belt's mean summer drought score was 0.3 (share of area in D2-D4, weighted by state production), against 6.5 in the ten neutral seasons. Rank correlation -0.68. The two worst drought years, 2012 and 2023, were both ENSO-neutral in spring.
Drought and the USDA number: the May-to-August change in the WASDE corn yield correlates -0.45 with the drought score. 2012 saw -25.7%, 2023 -3.5%, quiet years about +4%.
Drought and the price: this is where it falls apart. None of 45 pre-defined tests survived, and the season's drought score has a +0.19 rank correlation with the corn return over the following 13 weeks.
A strong autumn El Niño also isn't a promise: of the 8 years since 1950 with a Jul-Sep ONI of +1.0 or more, only 4 were still at El Niño level the next March-May.
17 seasons is a small sample and this year is outside anything in it, so I treat it as context, not a signal. Curious whether others look at ENSO for the ag markets, and if so, at which point in the chain.
Processing img b68ahnm068yh1...
Processing img 6ska1om068yh1...
Processing img zh0pmnm068yh1...
Processing img t8pi4om068yh1...
Processing img 2331rpm068yh1...
Processing img 74tg2nm068yh1...