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Related to Convergence: convergence technologies
The movement of the price of a futures contract toward the price of the underlying cash commodity. At the start, the contract price is usually higher because of time value. But as the contract nears expiration, and time value decreases, the futures price and the cash price converge. More generally, convergence trading involves taking two related assets that have different prices with the expectation that prices will converge (the cheaper asset is purchased and the more expensive is sold short).
The fact that the futures price and the spot price for a given asset approach one another as a futures contract on that asset approaches maturity. At maturity, the two prices should be equal. The existence of convergence is the basis for the theory that forward rates equal future spot rates, though this idea is more controversial.
The process by which the futures price and the cash price of an underlying asset approach one another as delivery date nears. The futures and cash prices should be equal on the delivery date.