The index is provided by S&P Dow Jones Indices and includes domestic companies from the energy sector which includes the following industries: oil, gas and consumable fuels; and energy equipment and services. The fund invests at least 80% of the fund"s net assets in financial instruments, that, in combination, provide 2X daily inverse (opposite) or short exposure to the index or to ETFs that track the index, consistent with the fund"s investment objective. It is non-diversified.