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, 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.