The Fund is an actively managed exchange-traded fund (ETF) that does not seek to replicate the performance of a specified index. The Fund is newly organized and invests in a q of U.S. dollar-denominated municipal and taxable short duration fixed income securities that in the Sub-Adviser's (as defined below) view offers relatively attractive after-tax income (i.e., securities that generate a greater amount of after-tax return than the comparable universe of U.S. dollar-denominated, investment-grade fixed income debt instruments over a specified period of time). The Fund invests, under normal circumstances, at least 50% of its total assets in municipal securities that pay interest that is exempt from U.S. federal income tax. These securities may pay interest that is subject to the U.S. federal alternative minimum tax and state and local income tax for certain taxpayers. The income earned and distributed to shareholders on taxable securities would not be exempt from U.S. federal, state or local income tax. The Fund invests, under normal circumstances, at least 80% of its total assets (plus the amount of any borrowings for investment purposes) either directly or indirectly (e.g., through derivatives) in a portfolio of U.S. dollar-denominated, investment-grade fixed income debt instruments. The fixed income debt instruments in which the Fund may invest include municipal securities, securities issued or guaranteed by the U.S. government and its agencies, corporate debt securities, agency and non-agency mortgage-backed securities of any kind, including commercial mortgage-backed securities (CMBS), asset-backed securities of any kind, and the rated debt tranches of collateralized loan obligations (CLOs) (i.e., securities backed by an underlying portfolio of loan obligations, which may include senior unsecured loans and subordinate corporate loans).