Strategy. To pursue its goal, the Fund normally invests 80% of its net assets in securities of small- and mid-capitalization companies. For purposes of this policy, the Fund considers a company to be small or mid capitalization if it has a market capitalization within the market capitalization range of companies in the Russell 2000 Index or the Russell Midcap Index, at the time of initial purchase. At times, the Portfolio Managers may emphasize certain sectors that they believe will benefit from market or economic trends. Although the Fund invests primarily in domestic securities, it may also invest up to 10% of its assets in securities of foreign companies. The Portfolio Managers use bottom-up, fundamental security analysis to identify what they believe … Show more… To pursue its goal, the Fund normally invests 80% of its net assets in securities of small- and mid-capitalization companies. For purposes of this policy, the Fund considers a company to be small or mid capitalization if it has a market capitalization within the market capitalization range of companies in the Russell 2000 Index or the Russell Midcap Index, at the time of initial purchase. At times, the Portfolio Managers may emphasize certain sectors that they believe will benefit from market or economic trends. Although the Fund invests primarily in domestic securities, it may also invest up to 10% of its assets in securities of foreign companies. The Portfolio Managers use bottom-up, fundamental security analysis to identify what they believe to be undervalued companies whose current market shares and balance sheets are strong. In addition, the Portfolio Managers tend to focus on companies whose financial strength is largely based on existing business lines rather than on projected growth. The Portfolio Managers seek to identify growing, financially strong small and mid-cap companies that they believe are mispriced due to a lack of analyst research coverage and the markets focus on short-term time horizons. The Portfolio Managers attempt to exploit these market inefficiencies and look for opportunities to invest in companies they believe to be undervalued. Factors in identifying such companies may include: a history of above average returns; an established market niche; circumstances that would make it difficult for new competitors to enter the market; the ability to finance their own growth; and a belief that the company has sound future business prospects. This approach is designed to let the Fund benefit from potential increases in stock prices, while endeavoring to limit the risks typically associated with small- and mid-cap securities. The Portfolio Managers seek to manage investment risk by maintaining broad issuer and industry diversification among companies, and by utilizing fundamental analysis of risk/return characteristics in securities selection. As part of their fundamental investment analysis the Portfolio Managers consider environmental, social and governance factors they believe are financially material to individual investments, where applicable. While this analysis is inherently subjective and may be informed by both internally generated and third-party metrics, data and other information, the Portfolio Managers believe that the consideration of financially material environmental, social and governance factors, alongside traditional financial metrics, may enhance the Funds overall investment process. The consideration of environmental, social and governance factors does not apply to certain instruments, such as certain derivative instruments, other registered investment companies, cash and cash equivalents. The consideration of environmental, social and governance factors as part of the investment process does not mean that the Fund pursues a specific impact or sustainable investment strategy. The Portfolio Managers follow a disciplined selling strategy and may sell a security when it reaches a target price, if a companys business fails to perform as expected, or when other opportunities appear more attractive. The Fund will not change its strategy of normally investing at least 80% of its net assets in securities of small- and mid- capitalization companies, without providing shareholders at least 60 days notice. This test is applied at the time the Fund invests; later percentage changes caused by a change in Fund assets, market values or company circumstances will not require the Fund to dispose of a holding. Show less