The Fund invests at least 80% of its total assets in component securities of the Cboe Russell 2000 BuyWrite Index (Underlying Index) or in investments that have economic characteristics that are substantially identical to the economic characteristics of such component securities, either individually or in the aggregate. The Fund's 80% investment policy is non-fundamental and requires 60 days prior written notice to shareholders before it can be changed. The Underlying Index measures the performance of a theoretical portfolio that holds a portfolio of the stocks included in the Russell 2000 Index (the Reference Index), and writes (or sells) a succession of one-month at-the-money covered call options on the Reference Index.