BNY Mellon Municipal Short Duration ETF (BKMS) is an exchange-traded fund that seeks to provide current income exempt from federal income tax through investment in a portfolio of short-term municipal securities. The fund primarily invests in investment-grade municipal bonds, notes, and variable rate demand obligations with effective durations typically under three years; it may also allocate to pre-refunded municipal securities and money market instruments for liquidity and yield enhancement. Managed by BNY Mellon Investment Adviser, Inc., a subsidiary of BNY Mellon, the ETF targets individual and institutional investors seeking tax-efficient, low-volatility income in the municipal bond market segment. Operations span U.S. municipal issuers across sectors including general obligation bonds, revenue bonds from utilities, hospitals, and transportation; the fund was launched in 2024 and is domiciled in the United States with administrative headquarters aligned to BNY Mellon in New York. Recent developments include the ETF's integration into BNY Mellon's expanded active ETF suite launched in mid-2025, featuring enhanced portfolio analytics and ESG screening options amid strategic alliances with municipal bond data providers like Municipal Market Analytics; additionally, BNY Mellon announced a $500 million seed commitment to short-duration municipal strategies in Q4 2025, bolstering BKMS's assets under management to over $250 million by early 2026.