AMG GW&K Municipal Bond Fund Class N (GWMTX) is an open-end mutual fund that seeks to provide current income exempt from federal income tax, with capital preservation as a secondary objective, by investing primarily in a diversified portfolio of municipal securities issued by U.S. state and local governments and their agencies. The fund maintains at least 80% of its net assets in such municipal bonds, focusing on high-quality, investment-grade issues with an emphasis on intermediate-term maturities and a portfolio duration generally aligned with the Bloomberg 10-Year Municipal Bond Index; it holds over 200 securities for diversification, including top holdings such as Iowa Finance Authority Revenue 5%, Metropolitan Transportation Authority New York Revenue 5%, and Massachusetts State 5%, with approximately 12.6% of assets in the top 10 positions across sectors like transportation, state general obligations, and utilities. The fund offers a no-load share class with a net expense ratio of 0.71%, a minimum initial investment of $2,000, monthly income distributions, a TTM yield of around 2.06%, and an effective duration of 6.07 years, targeting individual and institutional investors seeking tax-advantaged fixed income exposure in the national intermediate municipal bond category.
GW&K Investment Management, LLC serves as the fund's investment adviser, with a team led by portfolio managers John Fox and Martin Tourigny (since inception in 2009) alongside Kara South and Brian Moreland (since July 2022), leveraging the firm's pioneering expertise in municipal bonds since its founding in 1974 and headquartered in Boston, Massachusetts.
Assets under management stand at approximately $1.0 billion, with operations focused on the U.S. municipal bond market.
In recent developments, GW&K Investment Management launched the AMG GW&K Muni Income ETF (MUNX) on October 29, 2025, expanding its municipal bond offerings into an actively managed ETF format that seeks federal tax-exempt current income with flexibility across the municipal spectrum, duration adjustments, and bottom-up credit research.