The investment seeks investment results that correspond (before fees and expenses) generally to the price and distribution rate (total return) performance of the Tortoise North American Pipeline IndexSM (the underlying index). The fund will normally invest at least 80% of its total assets in securities that comprise the underlying index (or depository receipts based on such securities). The underlying index is a proprietary rules-based, capitalization weighted, float adjusted index designed to track the overall performance of equity securities of North American Pipeline Companies. The fund is non-diversified.