The index measures the performance of the domestic companies included in the integrated oil and gas, oil and gas exploration and production and oil and gas refining and marketing sub-industries as classified by the GICS. 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.