Strategy. Principal Investment Strategies The Fund invests primarily in equity securities of issuers that the Funds subadviser, Boston Partners Global Investors, Inc. (Boston Partners), believes are undervalued. Under normal circumstances, the Fund invests at least 80% of its net assets (plus the amount of any borrowings for investment purposes) in equity securities. Equity securities include common stock, preferred stock, securities convertible into common or preferred stock, rights, and warrants. Although the Fund may invest in companies of any size, the Fund will tend to focus on companies with large market capitalizations (which Boston Partners believes are generally above $1 billion). The Fund may invest up to 20% of its total assets in the securities of foreign issuers and American Depositary Receipts … Show more… Principal Investment Strategies The Fund invests primarily in equity securities of issuers that the Funds subadviser, Boston Partners Global Investors, Inc. (Boston Partners), believes are undervalued. Under normal circumstances, the Fund invests at least 80% of its net assets (plus the amount of any borrowings for investment purposes) in equity securities. Equity securities include common stock, preferred stock, securities convertible into common or preferred stock, rights, and warrants. Although the Fund may invest in companies of any size, the Fund will tend to focus on companies with large market capitalizations (which Boston Partners believes are generally above $1 billion). The Fund may invest up to 20% of its total assets in the securities of foreign issuers and American Depositary Receipts (ADRs), including emerging market securities. The Fund may invest up to 15% of its net assets in illiquid securities, including securities that are illiquid by virtue of the absence of a readily available market or legal or contractual restrictions on resale. The Fund may participate as a purchaser in initial public offerings of securities (IPOs). An IPO is a companys first offering of stock to the public. The Fund may at times have significant exposure to one or more industries or sectors. The Fund may hold a portion of its assets in cash or cash equivalents. In selecting securities for the Fund, Boston Partners examines various factors to determine the value characteristics of such issuers, including price-to-book ratios and price-to-earnings ratios. These value characteristics are examined in the context of the issuers operating and financial fundamentals, such as return on equity, earnings growth, and cash flow. Boston Partners selects securities for the Fund based on a continuous study of trends in industries and companies, earnings power, growth, and other investment criteria. Boston Partners will sell a security when it no longer meets one or more investment criteria, either through obtaining target value or due to an adverse change in the fundamentals or business momentum. Each holding has a target valuation established at purchase, which Boston Partners continuously monitors and adjusts as appropriate. Show less