Under normal market conditions, the Fund will invest at least 80 percent of its net assets (plus any borrowings for investment purposes) in structured credit investments. Structured credit investments are created through a securitization process, in which financial assets such as loans and mortgages are packaged into interest-bearing securities backed by those assets and issued to investors. Structured credit investments include, but are not limited to, residential mortgage-backed securities (RMBS), commercial mortgage-backed securities (CMBS), collateralized loan obligations (CLO) and asset-backed securities (ABS). The Fund may invest in agency securities, offered by government or quasi-government agencies, and non-agency securities, offered by non-governmental issuers. The Fund may also invest in investment companies that invest primarily in structured credit investments. The structured credit investments held by the investment companies in the Funds portfolio will be counted towards the requirement that the Fund invest 80% of its net assets in structured credit investments. The Fund may invest in callable agency securities, which give the issuer the right to redeem the security prior to maturity. As discussed in more detail below, the Fund may purchase securities on a when-issued or delayed delivery basis or in to-be-announced transactions (TBA Transactions), including mortgage dollar rolls.