The Fund employs a passive management or indexing investment approach designed to track the performance of the Index. The Fund generally uses a representative sampling strategy to achieve its investment objective, meaning it generally will invest in a sample of the securities in the Index whose risk, return and other characteristics resemble the risk, return and other characteristics of the Index as a whole. Under normal circumstances, the Fund invests at least 80 percent of its net assets (plus the amount of any borrowings for investment purposes) in the constituent securities of the Index, each of which is a security issued by a mid-cap company, identified in accordance with the Index Providers (as defined below) market-capitalization selection parameters, that is incorporated and headquartered in the United States. The Index Providers market-capitalization selection parameters generally provide that the Index will be composed of the top scoring 30 percent of companies that comprise the top 60 percent of the remaining eligible U.S. Quality Growth Index family constituent universe after the exclusion of the 500 largest companies by market capitalization.