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 its net assets in financial instruments, such as swap agreements, securities of the index, and ETFs that track the index, that, in combination, provide 2X daily leveraged exposure to the index, consistent with the fund's investment objective. It is non-diversified.