Strategy. Under normal circumstances, the Portfolio intends to invest at least 80% of its net assets, plus borrowings for investment purposes, in equity securities. For purposes of this Portfolio, equity securities shall include common stocks, preferred stocks, and other equity securities, and financial instruments that derive their value from such securities. The Portfolio invests primarily in securities of large capitalization growth companies. For purposes of this Portfolio, large capitalization companies are those companies with market capitalizations within the range of the Russell 1000 Growth Index (Russell 1000 Growth) at the time of investment (approximately $ 1.65 billion to $3.81 trillion as of December 31, 2024). The size of companies in the Russell 1000 Growth changes with market conditions, which can result … Show more… Under normal circumstances, the Portfolio intends to invest at least 80% of its net assets, plus borrowings for investment purposes, in equity securities. For purposes of this Portfolio, equity securities shall include common stocks, preferred stocks, and other equity securities, and financial instruments that derive their value from such securities. The Portfolio invests primarily in securities of large capitalization growth companies. For purposes of this Portfolio, large capitalization companies are those companies with market capitalizations within the range of the Russell 1000 Growth Index (Russell 1000 Growth) at the time of investment (approximately $ 1.65 billion to $3.81 trillion as of December 31, 2024). The size of companies in the Russell 1000 Growth changes with market conditions, which can result in changes to the market capitalization range of companies in the index. The Portfolio intends to invest primarily in common stocks, but may also invest in other equity securities that a Sub-Adviser believes provide opportunities for capital growth. The Portfolio may invest up to 15% of its total assets in securities of foreign issuers, including emerging market securities and depositary receipts. The Adviser will generally allocate the Portfolios assets among three or more Sub-Advisers, each of which manages its portion of the Portfolio using different yet complementary investment strategies. Under normal circumstances, one portion of the Portfolio will seek to track the performance of a particular index (Index Allocated Portion), and the other portions of the Portfolio will be actively managed (Active Allocated Portions). Under normal circumstances, the Adviser anticipates allocating approximately 50% of the Portfolios net assets to the Index Allocated Portion and the remaining 50% of the Portfolios net assets among the Active Allocated Portions. These percentages are targets established by the Adviser and actual allocations between the portions may deviate from these targets by up to 20% of the Portfolios net assets. The Index Allocated Portion seeks to track the performance (before fees and expenses) of the Russell 3000 Growth Index (Russell 3000 Growth) . This strategy is commonly referred to as an indexing strategy. Generally, the Index Allocated Portion utilizes a sampling construction process in which the Index Allocated Portion invests in a sub-set of the companies represented in the Russell 3000 Growth based on the Sub-Advisers analysis of key risk factors and characteristics. Such factors and characteristics include industry weightings, market capitalizations, return variability and yield. The Index Allocated Portion also may invest up to 15% of its assets in exchange-traded funds (ETFs) and up to 40% of its assets in equity index futures on one or more equity indices. Each Active Allocated Portion invests primarily in equity securities of companies whose above-average prospective earnings growth is not fully reflected, in the view of the Sub-Adviser, in current market valuations. The Active Allocated Portions may invest up to 25% of their total assets in securities of foreign companies, including companies based in developing countries. A Sub-Adviser may sell a security for a variety of reasons, such as to make other investments believed by the Sub-Adviser to offer superior investment opportunities. The Portfolio may invest in derivatives. It is anticipated that the Portfolios derivative instruments will consist primarily of equity index futures. The Portfolios investments in derivatives may be deemed to involve the use of leverage because the Portfolio is not required to invest the full market value of the contract upon entering into the contract but participates in gains and losses on the full contract price. The use of derivatives also may be deemed to involve the use of leverage because the heightened price sensitivity of some derivatives to market changes may magnify the Portfolios gain or loss. The Portfolios investments in derivatives may require it to maintain a percentage of its assets in cash and cash equivalent instruments to serve as margin or collateral for the Portfolios obligations under derivative transactions. Show less