The fund invests, under normal circumstances, at least 80% of its net assets in the securities of very small companies which, at the time of purchase, have a market capitalization of less than or equal to $600 million or are within the range of companies represented in the Russell Micro-Cap Growth Index, whichever is greater. It invests principally in the common stocks of companies that the fund's investment adviser believes have the potential for significant long-term growth in market value.