So investiert der ProShares Short Basic Materials: The investment seeks daily investment results that correspond to the inverse (-1x) of the daily performance of the Dow Jones U.S. Basic MaterialsSM 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 designed to measure the stock performance of U.S. companies in the basic materials industry. The fund is non-diversified.