This actively managed exchange-traded fund (ETF) primarily invests in investment-grade municipal debt securities, aiming for income that is exempt from U.S. federal income tax. Typically, at least 80% of its total assets are allocated to these tax-advantaged investments. The fund specifically targets municipal bond issuers whose operations or projects advance sustainable development, with selections aligning to United Nations Sustainable Development Goals (SDGs) 9, 11, and 12.