Futures Spreads: Carry and Inversion, Explained

What a futures spread is

A futures spread is the price difference between two delivery months of the same commodity — December corn versus July corn, November soybeans versus March soybeans. Traders quote it as one number: if July is trading 20 cents over December, the Dec–Jul spread is a 20-cent carry.

Carry: the market pays you to wait

When later months trade higher than nearby months, the market is in carry (also called contango). That premium is the market's offer to pay someone to store grain until it's wanted.

Whether the offer is worth taking depends on your cost of carry — interest on the money tied up, storage costs, shrink, and risk. If the spread pays more than your true cost of holding, storing hedged grain captures the difference. If it pays less, the "wait for better prices" plan has a negative expected yield built right into it.

Inversion: the market wants grain now

When nearby months trade higher than deferred months, the market is inverted (backwardation). An inverse is the market saying it wants grain now — usually because supplies are tight — and it is explicitly not paying anyone to store.

The old marketing rule holds: don't store into an inverse. If the nearby is worth more than the deferred, holding unpriced grain means volunteering to take the lower price later, plus paying storage for the privilege.

How to use spreads in practice

• Read the spread before deciding to store or move grain. It's the market's own forecast of what patience is worth.
• Pair it with basis. A wide carry with weak basis often argues for storing hedged; a strong basis with an inverse argues for moving grain and, if you're still bullish, re-owning on paper instead of in the bin.
• Watch the spread change. Spreads narrowing or inverting mid-season is real information about demand — often more honest than the flat price.