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 U.S. companies in the semiconductors subsector. The semiconductor subsector includes producers and distributors of semiconductors and other integrated chips, including other products related to the semiconductor industry, such as semiconductor capital equipment and motherboards. U.S. companies in this sub-sector are selected and then weighted based on market capitalization. The Indexs composition and the assigned weights are reevaluated every September with additional weight adjustments occurring in March, June and December.