The investment seeks daily investment results, before fees and expenses, that correspond to two times (2x) the daily performance of the Markit iBoxx $ Liquid High Yield 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 a market-value weighted index designed to provide a balanced representation of U.S. dollar denominated high yield corporate bonds for sale within the United States by means of including the most liquid high yield corporate bonds available. The fund is non-diversified.