Strategy. Under normal circumstances, the Portfolio invests substantially all of its assets (more than 80% of its net assets, plus the amount of any borrowings for investment purposes) in the common stocks of companies included in the MSCI KLD 400 Social Index (the Index) in the proportions in which they are represented in the Index. Should the Adviser change the investments used for purposes of this 80% threshold, you will be notified at least 60 days prior to the change. This is a passively managed Portfolio, which means that the Adviser does not actively choose the securities that should make up the Portfolio. The Index is a float-adjusted market capitalization weighted index designed to provide exposure to U.S. companies with outstanding … Show more… Under normal circumstances, the Portfolio invests substantially all of its assets (more than 80% of its net assets, plus the amount of any borrowings for investment purposes) in the common stocks of companies included in the MSCI KLD 400 Social Index (the Index) in the proportions in which they are represented in the Index. Should the Adviser change the investments used for purposes of this 80% threshold, you will be notified at least 60 days prior to the change. This is a passively managed Portfolio, which means that the Adviser does not actively choose the securities that should make up the Portfolio. The Index is a float-adjusted market capitalization weighted index designed to provide exposure to U.S. companies with outstanding environmental, social and governance (ESG) ratings and excluding exposure to companies with negative social or environmental impacts, all as identified by MSCI Inc. (the Index Provider or MSCI). As of March 31, 2025, the Index consisted of 402 companies identified by the Index Provider from the universe of companies included in the MSCI USA IMI Index, which targets approximately 99% of the market coverage of stocks that are listed for trading on major exchanges in the U.S., as determined by the Index Provider. MSCI constructs the Index based on considerations of ESG performance, sector alignment and size representation of each eligible company, as described in more detail below. The methodology MSCI uses to construct the Index is as of the date of this prospectus and is subject to change as determined from time to time by MSCI. The Index excludes companies whose products have negative social or environmental impacts. Companies that MSCI determines have significant involvement in the following businesses are not eligible for the Index: alcohol, gambling, tobacco, military weapons, civilian firearms, nuclear power, adult entertainment and genetically modified organisms. In evaluating ESG performance of eligible companies, MSCI uses proprietary ratings and research covering ESG criteria. MSCI identifies companies that demonstrate an ability to manage their ESG risks and opportunities. MSCI identifies key ESG issues that hold the greatest potential risk or opportunity for each industry sector, which may include the following: climate change, natural resources, pollution and waste, environmental opportunities, human capital, product liability, stakeholder opposition, social opportunities, corporate governance, and corporate behavior. MSCI calculates a companys exposure relating to a key issue based on an analysis of a companys business and takes into account a companys management process of that issue. MSCIs ESG criteria also includes, but is not limited to, an analysis of companies involved in very serious controversies, which may result in those companies exclusion from the Index. The Index is reviewed quarterly for adjustments, and when changes to the Index occur, the Adviser will attempt to replicate these changes within the Portfolio. However, any such changes may result in slight variations from time to time. The Index may include large, mid or small cap companies. The components of the Index, and the degree to which these components represent certain industry sectors, are likely to change over time. The Portfolio may buy and sell equity index futures and exchange traded funds (ETF) for investment exposure. For liquidity reasons, the Portfolio may invest to some degree in money market instruments. The Portfolio may also pursue its investment strategy by investing in other mutual funds. The Portfolio intends to be diversified in approximately the same proportion as the Index is diversified. The Portfolio may become non-diversified as defined under the Investment Company Act of 1940, as amended (the 1940 Act), solely because of a change in relative market capitalization or index weighting of one or more constituents of the Index. A non-diversified fund under the 1940 Act may invest a greater percentage of its assets in the securities of a limited number of issuers relative to a diversified fund. Shareholder approval will not be sought if the Portfolio crosses from diversified to non-diversified status under such circumstances. Show less