Strategy. To pursue its goal, the fund normally invests at least 80% of its net assets, plus any borrowings for investment purposes, in fixed-income securities that, at the time of purchase, are rated below investment grade ("high yield" or "junk" bonds) or are the unrated equivalent as determined by Alcentra NY, LLC, the fund's sub-adviser. The fund's portfolio may include various types of fixed-income securities, such as corporate bonds and notes, mortgage-related securities, asset-backed securities, floating rate loans (limited to up to 20% of the fund's net assets) and other floating rate securities, zero coupon securities, convertible securities, preferred stock and other debt instruments of U.S. and foreign issuers. In choosing securities for the fund, the fund's sub-adviser seeks to capture … Show more… To pursue its goal, the fund normally invests at least 80% of its net assets, plus any borrowings for investment purposes, in fixed-income securities that, at the time of purchase, are rated below investment grade ("high yield" or "junk" bonds) or are the unrated equivalent as determined by Alcentra NY, LLC, the fund's sub-adviser. The fund's portfolio may include various types of fixed-income securities, such as corporate bonds and notes, mortgage-related securities, asset-backed securities, floating rate loans (limited to up to 20% of the fund's net assets) and other floating rate securities, zero coupon securities, convertible securities, preferred stock and other debt instruments of U.S. and foreign issuers. In choosing securities for the fund, the fund's sub-adviser seeks to capture the higher yields offered by junk bonds, while managing credit risk and the volatility caused by interest rate movements. The fund's investment process involves a "top down" approach to security selection. The sub-adviser looks at a variety of factors when assessing a potential investment, including the state of the industry or sector, the company's financial strength, and the company's management. The sub-adviser also looks for companies that are underleveraged, have positive free cash flow, and are self-financing. There are no restrictions on the dollar-weighted average maturity or average effective duration of the fund's portfolio or on the maturities or durations of the individual fixed-income securities the fund may purchase. A bond's maturity is the length of time until the principal must be fully repaid with interest. Duration is an indication of an investment's "interest rate risk," or how sensitive a bond or the fund's portfolio may be to changes in interest rates. The fund also may invest in collateralized debt obligations (CDOs), which are a type of asset-backed security and include collateralized bond obligations (CBOs) and collateralized loan obligations (CLOs) and other similarly structured securities. CDOs generally issue separate series or "tranches" which vary with respect to collateral, risk and yield. To enhance current income, the fund may engage in a series of purchase and sale contracts or forward roll transactions in which the fund sells a mortgage-related security, for example, to a financial institution and simultaneously agrees to purchase a similar security from the institution at a later date at an agreed upon price. The fund also may make forward commitments in which the fund agrees to buy or sell a security in the future at a price agreed upon today. The fund typically will sell a security if the fund's sub-adviser believes it is overvalued from a valuation standpoint, another sector becomes relatively more attractive, and/or it expects fundamentals to deteriorate. In addition, at times, the fund may engage in active and frequent trading, which will increase portfolio turnover. Show less