The investment seeks daily investment results that correspond to two times the inverse (-2x) of the daily performance of the Nasdaq Biotechnology Index®. 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 a set of Nasdaq-listed biotechnology and pharmaceutical companies. Under normal circumstances, the fund will obtain inverse leveraged exposure to at least 80% of its total assets in components of the index or in instruments with similar economic characteristics. The fund is non-diversified.