Strategy. The Index is provided by S&P Dow Jones Indices (the Index Provider) and includes domestic companies from the energy sector, which includes the following industries: oil, gas and consumable fuels; and energy equipment and services, as classified by the Global Industry Classification Standards (GICS). The GICS classifications are determined primarily based on a companys revenues, however, earnings and market perception are also considered by GICS. The Index is one of eleven Select Sector Indexes developed and maintained in accordance with the following criteria: (1) each of the component securities in the Index is a constituent of the S&P 500 Index and (2) the Index is calculated by the Index Provider based on a proprietary modified market capitalization methodology which means … Show more… The Index is provided by S&P Dow Jones Indices (the Index Provider) and includes domestic companies from the energy sector, which includes the following industries: oil, gas and consumable fuels; and energy equipment and services, as classified by the Global Industry Classification Standards (GICS). The GICS classifications are determined primarily based on a companys revenues, however, earnings and market perception are also considered by GICS. The Index is one of eleven Select Sector Indexes developed and maintained in accordance with the following criteria: (1) each of the component securities in the Index is a constituent of the S&P 500 Index and (2) the Index is calculated by the Index Provider based on a proprietary modified market capitalization methodology which means that modifications may be made to the market capitalization weights of single stock concentrations in order to conform to the requirements of the Internal Revenue Code of 1986, as amended. As of December 31, 2024, the Index had 22 constituents which were concentrated in the energy sector. The Index is rebalanced quarterly. The components of the Index and the percentages represented by various sectors in the Index may change over time. The Fund will concentrate its investment in a particular industry or group of industries ( i.e. , hold 25% or more of its total assets in investments that provide inverse leveraged exposure to a particular industry or group of industries) to approximately the same extent as the Index is so concentrated. The Fund, under normal circumstances, invests at least 80% of the Funds net assets (plus borrowing for investment purposes) in financial instruments, including swap agreements, futures contracts, or short positions, that, in combination, provide 2X daily inverse (opposite) or short exposure to the Index or to exchange-traded funds ("ETFs") that track the Index, consistent with the Funds investment objective. The financial instruments in which the Fund most commonly invests are swap agreements and futures agreements which are intended to produce economically inverse leveraged investment results. The Fund may also gain inverse leveraged exposure by investing in a combination of financial instruments, such as swap agreements or futures agreements that provide short exposure to the Index, to a representative sample of the securities in the Index that has aggregate characteristics similar to those of the Index or to an ETF that tracks the same Index or a substantially similar index, or the Fund may short securities of the Index, or short an ETF that tracks the same Index or a substantially similar index. The Fund invests in derivatives as a substitute for directly shorting securities in order to gain inverse leveraged exposure to the Index or its components. When the Fund shorts securities, including the securities of another investment company, it borrows shares of that security or investment company, which it then sells. The Fund closes out a short sale by purchasing the security that it has sold short and returning that security to the entity that lent the security. On a day-to-day basis, the Fund is expected to hold money market funds, deposit accounts with institutions with high quality credit ratings ( i.e . investment grade or higher), and/or short-term debt instruments that have terms-to-maturity of less than 397 days and exhibit high quality credit profiles, including U.S. government securities and repurchase agreements. The Fund seeks to remain fully invested at all times consistent with its stated inverse leveraged investment objective, but may not always have inverse exposure to all of the securities in the Index, or its weighting of inverse exposure to securities or industries may be different from that of the Index. In addition, the Fund may have inverse exposure to securities, ETFs or financial instruments not included in the Index. The Fund will attempt to achieve its investment objective without regard to overall market movement or the increase or decrease of the value of the securities in the Index. At the close of the markets each trading day, Rafferty rebalances the Funds portfolio so that its exposure to the Index is consistent with the Funds inverse leveraged investment objective. For example, if the Index has fallen on a given day, net assets of the Fund should rise, meaning that the Funds exposure will need to be increased. Conversely, if the Index has risen on a given day, net assets of the Fund should fall, meaning the Funds exposure will need to be reduced and that a shareholder should lose money, a result that is the opposite of traditional index tracking ETFs. This re-positioning strategy may result in high portfolio turnover. The terms daily, day, and trading day, refer to the period from the close of the markets on one trading day to the close of the markets on the next trading day. The Fund is non-diversified, meaning that a relatively high percentage of its assets may be invested in a limited number of issuers of securities. Additionally, the Funds investment objective is not a fundamental policy and may be changed by the Funds Board of Trustees without shareholder approval. Because of daily rebalancing and the compounding of each days return over time, the return of the Fund for periods longer than a single day will be the result of each days returns compounded over the period, which will very likely differ from -200% of the return of the Index over the same period. The Fund will lose money if the Index performance is flat over time, and as a result of daily rebalancing, the Indexs volatility and the effects of compounding, it is even possible that the Fund will lose money over time while the Indexs performance decreases over a period longer than a single day. Show less