The investment seeks investment results, before fees and expenses, that match the performance of the S&P 500® VIX Mid-Term Futures Index. The fund seeks to meet its investment objective, by taking long positions in VIX futures contracts. It will also hold cash or cash equivalents such as U.S. Treasury securities or other high credit quality, short-term fixed-income or similar securities (such as shares of money market funds) as collateral for Financial Instruments and pending investment in Financial Instruments.