Strategy. Under normal circumstances, the Portfolio invests at least 80% of its net assets (plus the amount of any borrowings for investment purposes) in bonds and other fixed-income securities. For purposes of this 80% policy, bonds and other fixed-income securities include, without limitation, bonds, debt instruments, and other fixed income and income-producing debt instruments, of any kind, issued or guaranteed by governmental or private-sector entities. For purposes of satisfying this 80% policy, the Portfolio may also invest in derivative instruments that provide investment exposure to, or exposure to risk factors associated with, bonds and other debt instruments. The debt instruments in which the Portfolio may invest include securities issued or guaranteed by the U.S. government, its agencies, instrumentalities or sponsored enterprises, … Show more… Under normal circumstances, the Portfolio invests at least 80% of its net assets (plus the amount of any borrowings for investment purposes) in bonds and other fixed-income securities. For purposes of this 80% policy, bonds and other fixed-income securities include, without limitation, bonds, debt instruments, and other fixed income and income-producing debt instruments, of any kind, issued or guaranteed by governmental or private-sector entities. For purposes of satisfying this 80% policy, the Portfolio may also invest in derivative instruments that provide investment exposure to, or exposure to risk factors associated with, bonds and other debt instruments. The debt instruments in which the Portfolio may invest include securities issued or guaranteed by the U.S. government, its agencies, instrumentalities or sponsored enterprises, corporate debt instruments (including Yankee bonds, Eurobonds, and Supranational bonds), taxable municipal bonds, collateralized loan obligations ( CLOs), mortgage-related securities (including without limitation collateralized mortgage obligations), asset-backed securities (including without limitation collateralized debt obligations) foreign (non-U.S.) sovereign debt obligations issued in U.S. dollars, and foreign (non-U.S.) agency debt obligations issued in U.S. dollars. The Portfolio may also hold a portion of its assets in cash and cash equivalents. The Portfolio may also invest in derivatives, including forward foreign currency exchange contracts, futures, options, and swaps (including credit default swaps) involving securities, securities indices and interest rates, which may be denominated in the U.S. dollar or foreign (non-U.S.) currencies. The Portfolio typically uses derivatives to reduce exposure to other risks, such as interest rate or currency risk, to substitute for taking a position in the underlying asset, and/or to enhance returns in the Portfolio. The Portfolios sub-adviser (the Sub-Adviser) follows a value-driven, active, strategic approach to portfolio decisions that considers duration, yield curve exposure, credit exposure, and sector weightings that are based upon the broad investment themes of its global macroeconomic research platform as they apply to U.S. markets. As part of its investment process, the Sub-Adviser develops an outlook for macroeconomic variables such as inflation, growth, and unemployment in the United States as well as in other countries that may impact U.S. fixed income sectors. The Sub-Adviser then develops a viewpoint on the business cycle and positions the strategys duration, sector weighting and credit exposures accordingly. The strategy incorporates analysis of material environmental, social, and governance ( ESG) issues that may impact an investment's risk profile and performance. The Sub-Adviser expects that the Portfolios weighted average portfolio duration will generally range from 1 year to 10 years and has the flexibility to reduce portfolio duration if it believes that duration risk poses a significant threat to capital appreciation. The Portfolios weighted average portfolio duration may also exceed this range meaningfully at times. Duration is a commonly used measure of risk in debt instruments as it incorporates multiple features of debt instruments ( e.g. , yield, coupon, maturity, etc.) into one number. Duration is a measure of sensitivity of the price of a debt instrument to a change in interest rates. Duration is a weighted average of the times that interest payments and the final return of principal are received. The weights are the amounts of the payments discounted by the yield-to-maturity of the debt instrument. Duration is expressed as a number of years. The bigger the duration number, the greater the interest rate risk or reward for the debt instrument prices. For example, the price of a bond with an average duration of 5 years would be expected to fall approximately 5% if market interest rates rose by 1%. Conversely, the price of a bond with an average duration of 5 years would be expected to rise approximately 5% if market interest rates dropped by 1%. The Portfolio may invest in other investment companies, including exchange-traded funds ( ETFs), to the extent permitted under the Investment Company Act of 1940, as amended, and the rules and regulations thereunder, and under the terms of applicable no-action relief or exemptive orders granted thereunder. The Sub-Adviser may sell securities for a variety of reasons, such as to secure gains, limit losses, or redeploy assets into opportunities believed to be more promising. The Portfolio may lend portfolio securities on a short-term or long-term basis, up to 33 ?1 / 3 % of its total assets. Show less