Strategy. The Portfolio attempts to achieve its goal by investing, under normal market conditions, at least 65% of its assets in equity securities. Equity securities include common stocks, preferred stocks, securities convertible into stocks, and depositary receipts for such securities. The Portfolio may invest up to 25% of its net assets in foreign securities. In selecting investments for the Portfolio, the subadviser is not constrained by any particular investment style. The subadviser may invest the Portfolios assets in the stocks of companies it believes to have above average earnings growth potential compared to other companies (growth companies), in the stocks of companies it believes are undervalued compared to their perceived worth (value companies), or in a combination of growth and value … Show more… The Portfolio attempts to achieve its goal by investing, under normal market conditions, at least 65% of its assets in equity securities. Equity securities include common stocks, preferred stocks, securities convertible into stocks, and depositary receipts for such securities. The Portfolio may invest up to 25% of its net assets in foreign securities. In selecting investments for the Portfolio, the subadviser is not constrained by any particular investment style. The subadviser may invest the Portfolios assets in the stocks of companies it believes to have above average earnings growth potential compared to other companies (growth companies), in the stocks of companies it believes are undervalued compared to their perceived worth (value companies), or in a combination of growth and value companies. While the Portfolio may invest its assets in securities of companies of any size, the Portfolio primarily invests in securities of companies with large capitalizations. The subadviser normally invests the Portfolios assets across different industries and sectors, but the subadviser may invest a significant percentage of the Portfolios assets in a single industry or sector. The subadviser uses an active bottom-up investment approach to buying and selling investments for the Portfolio. Investments are selected primarily based on fundamental analysis of individual issuers and their potential in light of their financial condition, and market, economic, political, and regulatory conditions. Factors considered may include analysis of an issuers earnings, cash flows, competitive position, and management ability. The subadviser may also consider environmental, social and governance (ESG) factors in its fundamental investment analysis where MFS believes such factors could materially impact the economic value of an issuer. ESG factors considered may include, but are not limited to, climate change, resource depletion, an issuers governance structure and practices, data protection and privacy issues, and diversity and labor practices. Quantitative screening tools that systematically evaluate an issuers valuation, price and earnings momentum, earnings quality, and other factors may also be considered. Show less