The investment seeks to track the investment results of the Morningstar US Large-Mid Cap IndexSM composed of large- and mid-capitalization U.S. equities. The fund generally invests at least 90% of its assets in securities of the underlying index and in depositary receipts representing securities of the underlying index. The underlying index measures the performance of stocks issued by large-mid capitalization companies that have exhibited similar growth and value characteristics, as determined by Morningstar, Inc. (Morningstar or the index provider) proprietary index methodology.