The fund, under normal circumstances, invests at least 80% of the fund"s net assets in financial instruments, including swap agreements, futures contracts, or short positions, that, in combination, provide 3X daily inverse (opposite) or short exposure to the index or to ETFs that track the index, consistent with the fund"s investment objective. The index is designed to measure the performance of the biotechnology sub-industry based on the GICS. The fund is non-diversified.