The Fund invests in financial instruments that ProShare Advisors believes, in combination, should produce daily returns consistent with the Daily Target. The Index is designed to measure the performance of real estate companies included in the S&P 500 Index. The S&P 500 Index is designed to measure the performance of the largest 500 companies listed and domiciled in the U.S. The Index includes real estate companies in the following industries according to the Global Industry Classification Standard (GICS) as diversified real estate investment trusts (REITs), industrial REITs, hotel and resort REITs, office REITs, heath care REITs, residential REITs, retail REITs, specialized REITs, and real estate management and development. These companies are then weighted based on market capitalization. The Indexs composition and the assigned weights are reevaluated every September with additional weight adjustments in March, June, and December.