The investment seeks investment results, before fees and expenses, that track the performance of the Merrill Lynch Factor Model-Exchange Series (the benchmark). The fund invests in financial instruments that ProShare Advisors believes, in combination, should track the performance of the benchmark. The benchmark seeks to provide the risk and return characteristics of the hedge fund asset class by targeting a high correlation to the HFRI Fund Weighted Composite Index (the HFRI). The HFRI is designed to reflect hedge fund industry performance through an equally weighted composite of over 2000 constituent funds. The fund is non-diversified.