The Fund invests in financial instruments that ProShare Advisors believes, in combination, should track the performance of the Index. The Index is designed to measure the performance of companies in the Nasdaq U.S. Large Cap Index whose stock prices have historically exhibited relatively high correlation to movements in interest rates. The Nasdaq U.S. Large Cap Index is designed to measure the performance of the largest companies in the United States. Each quarter, each company and each industry included in the Nasdaq U.S. Large Cap Index is evaluated and ranked based on its weekly market-neutral correlation with the U.S. 10-year Treasury yield over the prior three years. The five industries with the highest industry correlation are selected.