Grain Basis and Elevator Economics
The price a farmer actually gets for grain is the futures price plus or minus a local basis, and that basis is really the elevator's fee for storing, handling, and transporting grain to wherever demand actually is.
Prerequisites: Agricultural Futures and Crop Cycles, Transport Costs and Pipeline Tariffs
A farmer selling corn doesn't get quoted the CME futures price. They get quoted the futures price plus or minus a local adjustment set by the grain elevator buying from them — and that adjustment, called basis, is really the elevator charging (or crediting) for everything involved in turning a truckload of grain sitting in a farmer's bin into grain that's been stored, blended to spec, and shipped to wherever it's actually needed, whether that's a nearby feedlot, an export terminal, or a processing plant hundreds of miles away.
Grain basis is the local cash price minus the relevant futures price. It's mostly a reflection of local transport cost to the nearest demand point, storage cost and availability, and local supply-demand balance — a strong local harvest widens (weakens) basis, while strong local demand or a transport bottleneck narrows or strengthens it.
What actually determines an elevator's basis quote
An elevator's basis quote bundles several real costs. First, freight: the cost to truck or rail grain to the nearest place it can be sold — a plant, a river terminal, an export port — is subtracted from the futures price to arrive at what the elevator can pay locally. Second, storage and handling: the elevator has to unload, dry, grade, blend, and store the grain until shipped, needing a margin for that service and the risk of holding inventory. Third, local supply and demand: at harvest, when every farmer delivers simultaneously and elevators near capacity, basis weakens sharply since storage is scarce; later, once the glut clears, basis often strengthens as local supply tightens relative to the national futures picture.
Worked example
December corn futures are trading at $4.80/bushel. An elevator 40 miles from the nearest river terminal quotes a basis of -$0.35/bushel at the peak of harvest, so a farmer delivering corn that week receives $4.80 − $0.35 = $4.45/bushel. Two months later, once the harvest glut has cleared and the elevator's bins have emptied out through shipments to the terminal, the same elevator quotes a basis of -$0.15/bushel against a futures price that has meanwhile moved to $4.70/bushel — the farmer waiting to sell now receives $4.70 − $0.15 = $4.55/bushel, a better cash price despite the lower futures print, purely because basis strengthened by $0.20/bushel over that period.
What this means in practice
Farmers who understand basis patterns can improve their realized price by choosing when to deliver relative to the basis cycle, separate from any view on futures direction — locking in a futures hedge at harvest while deferring the cash sale (a "basis contract") is a standard tool for capturing seasonal basis strengthening. Grain merchandisers trade basis itself as a business, buying on weak harvest-time basis and selling into stronger basis later, independent of where outright futures move.
A farmer who only watches the futures price can sell at the "right" futures level but still get a poor cash price if local basis is unusually weak that week — and vice versa. Basis risk is a separate, real risk from futures price risk, and a futures hedge alone does not protect against it.
Further reading
- USDA, Agricultural Marketing Service, grain basis reporting