What does Buyer's Call (in commodities) mean?
A contract between a buyer and seller when a buyer needs a commodity that the seller has in stock and will need it at a later date but not now. The seller therefore agrees to give it to buyer now in exchange for a futures contract on the same commodity. The buyer purchases the futures contract to ensure delivery of commodity at the later date.
Futures Knowledge Explains Buyer's Call (in commodities)
Buyer’s call transaction is done at a price above a futures contract. Buyer’s call meets the immediate requirement of a commodity by the buyer and the seller gets in exchange a futures contract which would recoup his inventory for the commodity at a later date. The commodity needs to match in both quantity and quality.