The Fund mainly invests in mortgage-backed securities, asset-backed securities, mortgage-related securities, adjustable rate mortgages, money market instruments, and structured investments. These investments may be structured as collateralized mortgage obligations (agency and non-agency), stripped mortgage-backed securities, commercial mortgage-backed securities, and mortgage pass-through securities. These securities may be structured such that payments consist of interest-only (IO), principal-only (PO) or principal and interest. Under normal circumstances, the Fund will invest at least 80% of its Assets in bonds. For purposes of this policy, Assets means net assets plus the amount of borrowings for investment purposes.