The investment seeks investment results that generally correspond (before fees and expenses) to the price and yield of the S&P U.S. High Quality Preferred Stock Index. The fund generally will invest at least 90% of its total assets in U.S.-listed preferred stocks that comprise the index. The index is designed to provide exposure to U.S.-listed preferred stocks that meet the minimum size, liquidity, type of issuance, and quality criteria. The fund is non-diversified.