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 securities and derivatives that ProShare Advisors believes, in combination, should have similar daily return characteristics as two times (2x) the daily return of the index. 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.