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 mid-cap companies listed and domiciled in the U.S. The Index selects 400 companies based on market capitalization. As of July 31, 2024, the market capitalization of companies in the Index was between dollar 6.7 billion and dollar 18 billion. The selected 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.