The investment seeks investment results that correspond (before fees and expenses) generally to the price and yield performance of its underlying index, the Alerian Energy Infrastructure Index (AMEI) (the "index"). The index is comprised of 30 equity securities of issuers headquartered or incorporated in the United States and Canada that engage in the transportation, storage, and processing of energy commodities ("midstream energy businesses"). The fund will normally invest at least 90% of its total assets in securities that comprise the index (or depositary receipts based on such securities). It is non-diversified.