ProShares Short Russell2000 seeks daily investment results that correspond to the inverse (-1x) of the daily performance of the Russell 2000 Index. The fund invests in financial instruments that ProShare Advisors believes, in combination, should produce daily returns consistent with the fund's investment objective. It is a float-adjusted, market capitalization-weighted index containing approximately 2000 of the smallest companies in the Russell 3000 Index or approximately 10% of the total market capitalization of the Russell 3000 Index. The fund is non-diversified.