First Trust Flexible Municipal High Income ETF (MFLX)

Under normal market conditions, the fund seeks to achieve its investment objective by investing at least 80% of its net assets (plus any investment borrowings) in municipal debt securities that pay interest that is exempt from regular federal income taxes. Municipal debt securities are generally issued by or on behalf of states, territories or possessions of the United States and the District of Columbia and their political subdivisions, agencies, authorities and other instrumentalities.