The investment seeks investment results that closely correspond, before fees and expenses, to the performance of the MSCI US REIT Custom Capped Index. The fund will invest at least 80% of its assets in securities included in the underlying index. The underlying index is a free-float adjusted market-cap weighted index designed to measure the performance of U.S. equity real estate investment trust (REIT) securities. The fund may invest up to 20% of its assets in exchange-traded futures to seek performance that corresponds to the underlying index.