Meaning of CONVERGENCE in English
The movement of the price of a futures contract toward the price of the underlying cash commodity . At the start, the contract price is higher because of time value . But as the contract nears expiration, and time value decreases, the futures price and the cash price converge.
Campbell R. Harvey. Hypertextual finance English glossary. Английский словарь гипертекстовых финансов. 2012