The Fund seeks to track the investment results of the MSCI USA Low Size Index (the Underlying Index), which is based on a traditional market capitalization-weighted parent index, the MSCI USA Index (the Parent Index). The Parent Index includes U.S. large- and mid-capitalization stocks, as defined by MSCI Inc. (the Index Provider or MSCI). The Underlying Index is constructed by applying a mathematical formula at each rebalancing that reweights the components of its market capitalization-weighted Parent Index, such that the representation of smaller capitalization companies is increased relative to larger capitalization companies. In addition, at each rebalancing, the Index Provider calculates a constraint factor for each component. The constraint factor is the ratio of the components weight in the Underlying Index to that components weight in the Parent Index. The constraint factor is held constant between each rebalancing, except in the case of corporate events (as defined by the Index Provider).