Under normal circumstances, the fund will invest at least 80% of its assets (net assets plus the amount of any borrowings made for investment purposes) in companies with substantial natural resource assets or in securities the value of which is related to the market value of some natural resource asset. Equity securities include common stock, preferred stock, securities convertible into common stock, rights to subscribe for common stock, and derivative securities or instruments, such as options, the value of which is based on a common stock or group of common stocks. The fund is non-diversified.