This fund allocates a minimum of 80% of its net assets, along with any borrowed capital, to either the index's component securities or other investments that closely replicate them, whether held individually or as a group. Importantly, this 80% allocation strategy is not a permanent fixture and can be modified; however, shareholders must receive 60 days' prior written notice of any such change. The underlying index it tracks is designed to reflect the performance of a conceptual portfolio that utilizes a covered call strategy.