The investment seeks investment results that correspond generally to the price and yield (before the fund's fees and expenses) of an equity index called the S&P United States REIT Index. The fund will normally invest at least 90% of its net assets (including investment borrowings) in the real estate investment trusts (REITs) that comprise the index. The index seeks to measure the performance of publicly-traded traded REITs domiciled in the United States that meet certain eligibility requirements.