Strategy. Under normal circumstances, we invest: at least 80% of the Funds net assets in municipal securities whose interest is exempt from federal income tax, but not necessarily federal alternative minimum tax (AMT); up to 20% of the Funds total assets in securities whose interest is subject to federal AMT; up to 20% of the Funds total assets in below investment-grade municipal securities; and up to 10% of the Funds total assets in inverse floaters. We invest principally in municipal securities of states, territories and possessions of the United States whose interest is exempt from federal income tax, but not necessarily federal AMT. Some of the securities may be below investment grade or may be unrated and deemed by us to … Show more… Under normal circumstances, we invest: at least 80% of the Funds net assets in municipal securities whose interest is exempt from federal income tax, but not necessarily federal alternative minimum tax (AMT); up to 20% of the Funds total assets in securities whose interest is subject to federal AMT; up to 20% of the Funds total assets in below investment-grade municipal securities; and up to 10% of the Funds total assets in inverse floaters. We invest principally in municipal securities of states, territories and possessions of the United States whose interest is exempt from federal income tax, but not necessarily federal AMT. Some of the securities may be below investment grade or may be unrated and deemed by us to be of comparable quality. We may also invest a portion of the Funds assets in securities whose interest is subject to federal AMT. We may use futures for duration and yield curve management. While we may purchase securities of any maturity, under normal circumstances, we expect the Funds dollar-weighted average effective maturity to be between 3 and 20 years. We may invest up to 10% of the Funds total assets in inverse floaters to seek enhanced returns. Inverse floaters are derivative debt instruments created by depositing a municipal security in a trust. Inverse floaters pay interest at rates that generally vary inversely with specified short-term interest rates and involve leverage. We intend to limit leverage created by the Funds investment in inverse floaters to an amount equal to 10% of the Funds total assets. We evaluate each security in which the Fund invests using both a traditional municipal bond credit analysis and a consideration of the securitys environmental, social and governance (ESG) impacts. Using our ESG impact framework, securities that we determine to have a positive ESG impact are generally deemed eligible for purchase. In making this determination, we consider the following, where available: an issuers history of positive ESG practices, a securitys use-of-proceeds information, an issuers impact on underserved populations (such as low socio-economic communities), and a third-party issuer/security ESG rating. A securitys positive ESG impact can be determined under any of the four factors described above. Our ESG impact framework is conducted on an industry sector basis and includes the use of key ESG indicators that vary by sector. In assessing a securitys use of proceeds and an issuers history of positive ESG practices, we consider factors such as energy efficiency, pollution control, and environmentally sustainable management. In assessing a securitys use of proceeds and an issuers impact on underserved populations, we consider factors such as access to essential services and affordable housing. Municipal securities that we have determined to have a positive ESG impact may include securities issued to fund education (K-12, post-secondary), affordable housing, water treatment, public transportation, healthcare, and energy efficiency projects, among many others. We use a combination of top-down and bottom-up research to cover the four main elements of total return: duration management, yield curve positioning, sector and credit quality allocation, and security selection. Our top-down analysis involves an evaluation of macroeconomic factors that may include, among others, the pace of economic growth, employment conditions, inflation, and monetary and fiscal policy. Our bottom-up analysis, which involves intensive research into the credit fundamentals of individual issuers and the relative value of individual issues, is used to uncover solid investment opportunities. Securities are selected based on several factors, including, among others, improving financial trends, positive industry and sector dynamics, improving economic conditions, specific demographic trends, the degree of a securitys positive ESG impact and consideration of ESG risks. Securities may be sold based on relative value considerations and could be replaced with a security that presents a better value or risk/ reward profile. A security may also be sold due to changes in credit characteristics, outlook, change in our evaluation of ESG impact or ESG risk, as well as changes in portfolio strategy or cash flow needs. Show less