What Determines Illinois Grain Basis
Central Illinois basis for corn typically runs 10–25¢ negative. Southern Illinois (river access) can tighten to 5¢ or better during strong export demand.
How to Use Basis in Your Grain Marketing Plan
When Illinois basis strengthens (cash rising relative to futures), local demand is outpacing local supply. This is often the best window for cash sales or HTA contract execution. Basis is compensating you for your geographic location — don't leave it on the table.
When Illinois basis weakens, local supply is exceeding local demand. Consider on-farm storage or a basis contract (locks in basis without pricing futures) if you expect basis to recover as the marketing year progresses and local demand firms up.
Seasonal Basis Patterns in Illinois
Basis in Illinois typically follows a predictable seasonal pattern. Corn and soybean basis is usually weakest at or shortly after harvest (September–November) when local supply peaks. Basis tends to strengthen through winter and spring as local stocks decline and elevator demand builds ahead of the next crop year.
The best cash grain sales for Illinois producers historically occur in one of two windows: (1) pre-harvest new-crop forwards if basis is historically strong, or (2) January–March when bin-run stocks are tight and elevators compete aggressively for remaining inventory.
Elevator Infrastructure in Illinois
Key Illinois elevators: Bunge Decatur, ADM Decatur, Archer Daniels Midland, CGB Enterprises.
Get Weekly Basis Alerts for Illinois
GrainBrief monitors USDA AMS elevator bids daily and sends you a basis trend alert when Illinois basis moves more than 10¢ in a week — the threshold that historically signals a marketing opportunity.
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