The investment seeks to track the investment results of an index composed of U.S. companies that have positive environmental, social and governance characteristics as identified by the index provider. 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. It seeks to track the investment results of the MSCI KLD 400 Social Index (the "underlying index"), which is a free float-adjusted market capitalization weighted index designed to provide exposure to U.S. companies that have positive environmental, social and governance (ESG) characteristics.