The investment seeks daily investment results, before fees and expenses, that correspond to two times (2x) the daily performance of the Dow Jones U.S. Select TelecommunicationsSM Index. The fund invests in financial instruments that ProShare Advisors believes, in combination, should produce daily returns consistent with the fund's investment objective. The index is a measure of U.S. stock market performance of fixed line (regional and long-distance carriers) and mobile telephone services (cellular, satellite and paging services). The fund is non-diversified.