Strategy. Under normal market conditions, the fund invests at least 80% of its net assets in high- and medium-grade, non-money market debt securities. These securities, which may be payable in U.S. or foreign currencies, may include corporate bonds and notes, government securities, securities backed by mortgages or other assets, collateralized loan obligations, and collateralized mortgage obligations. Shorter-term debt securities round out the portfolio. The fund invests most of its assets in investment-grade securities. An investment-grade security is one that has been rated by an independent rating agency in its top four credit quality categories or determined by the advisor to be of comparable credit quality. The weighted average maturity of the funds portfolio must be three and one-half years or longer. … Show more… Under normal market conditions, the fund invests at least 80% of its net assets in high- and medium-grade, non-money market debt securities. These securities, which may be payable in U.S. or foreign currencies, may include corporate bonds and notes, government securities, securities backed by mortgages or other assets, collateralized loan obligations, and collateralized mortgage obligations. Shorter-term debt securities round out the portfolio. The fund invests most of its assets in investment-grade securities. An investment-grade security is one that has been rated by an independent rating agency in its top four credit quality categories or determined by the advisor to be of comparable credit quality. The weighted average maturity of the funds portfolio must be three and one-half years or longer. The fund may invest in securities issued or guaranteed by the U.S. Treasury and certain U.S. government agencies or instrumentalities such as the Government National Mortgage Association (Ginnie Mae). Ginnie Mae is supported by the full faith and credit of the U.S. government. Securities issued or guaranteed by other U.S. government agencies or instrumentalities, such as the Federal National Mortgage Association (Fannie Mae), the Federal Home Loan Mortgage Corporation (Freddie Mac), and the Federal Home Loan Bank (FHLB) are not guaranteed by the U.S. Treasury or supported by the full faith and credit of the U.S. government. However, they are authorized to borrow from the U.S. Treasury to meet their obligations. In addition to the debt securities described above, the fund may also invest in bank loans. The fund also may invest in derivative instruments provided that such investments are in keeping with the funds investment objective. Such derivatives may include futures contracts, options on futures contracts, and swaps (including credit default swaps). The fund may use foreign currency exchange contracts to shift investment exposure from one currency into another for hedging purposes. The portfolio managers select securities using an approach that integrates macroeconomic inputs, technical analysis of the relative value among various sectors, and fundamental research on individual securities. The macroeconomic framework provides interest rate and duration guidelines for the fund by analyzing economic activity, inflation, and monetary policy. Portfolio managers select individual securities using in-depth fundamental analysis designed to provide a detailed understanding of the credit worthiness of a security and its related market. As the market environment and investment opportunities change, portfolio managers buy and sell securities to meet the funds evolving sector allocations and credit quality standards. The fund may engage in active and frequent trading of portfolio securities to achieve its principal investment strategies. This may cause higher transaction costs and may affect performance. It may also result in the realization and distribution of capital gains. Show less