Why the deadline changes a wheat contract
A futures contract is an agreement tied to a commodity at a specified future date. As that date approaches, its price cannot drift far from the price of wheat available now: otherwise, traders could exploit the gap by buying the cheaper version and selling the more expensive one. This pull toward the current cash-market price is called convergence.
That link makes nearby contracts sensitive to immediate conditions. A storm forecast three years ahead leaves many seasons for planting decisions, other harvests, and changing demand to alter the outlook. A storm threatening wheat that must soon be delivered—or settled under the contract’s rules—can affect supplies with little time left to respond. The market has less room to wait for the problem to pass or for new supply to arrive.
Trading can sharpen the move
Expiration also forces a decision. Traders who do not want to take or make delivery, where the contract allows physical delivery, usually close their position or move it into a later-dated contract. As activity shifts away from the expiring contract, fewer willing buyers and sellers may be available at each price. In a thin market, even a modest burst of buying or selling can move the quoted price more sharply.
So a sudden swing near expiration can reflect both a real change in the immediate wheat outlook and the mechanics of a contract nearing its finish. The key distinction is practical: a distant contract prices uncertainty over time; a near-dated one is increasingly anchored to wheat that must be accounted for now.
