- Sector
- Financial Services
- Industry
- Asset Management - Income
- Address
- 2300 North Ridgetop Road Santa Fe NM United States of America 87506-8361
- IPO Date
- Apr 1, 2009
- Business
- Thornburg Strategic Municipal Income Fund Class C (TSSCX) is an open-end mutual fund managed by Thornburg Investment Management that seeks high current income exempt from federal income tax by investing principally in a diversified portfolio of municipal obligations issued by states, state agencies, local governments and their agencies, territories and possessions of the United States, and the District of Columbia; the fund may also invest in municipal derivative securities, such as municipal bond futures, swap agreements, options on municipal bonds or bond indices, and variable or floating rate securities, as well as up to 20% in taxable fixed-income securities including U.S. Treasury and agency securities, corporate bonds, mortgage-backed securities, and asset-backed securities. The fund's portfolio, as of August 31, 2025, features approximately 16.30% concentration in its top five holdings, including Port of Port Arthur Texas Navigation District Environmental Facilities Revenue bonds, New York City Transitional Finance Authority Revenue bonds, and Kentucky Public Energy Authority Gas Supply Revenue bonds; it maintains a weighted average coupon, effective duration targeting intermediate-term municipal bonds, and low exposure to alternative minimum tax (AMT)-subject obligations, benchmarked against the ICE BofA U.S. Municipal Securities Index within the Morningstar Muni National Intermediate category. Headquartered in Santa Fe, New Mexico, where Thornburg Investment Management was founded in 1982, the fund operates primarily in the United States market, targeting taxable investors seeking tax-efficient income with moderate credit risk and interest rate sensitivity. The Class C share class, which carries a net expense ratio of 1.28%, a 0.60% deferred load, and a minimum initial investment of $5,000, was incepted on April 1, 2009, with total net assets for the fund reaching approximately $367.51 million and the Class C share class at $3.50 million as of recent data. In recent developments, portfolio manager Craig Mauermann joined the team on April 1, 2025, complementing longstanding managers David Ashley (since February 1, 2019) and Eve Lando (since July 1, 2020) in overseeing the fund's relative value approach amid ongoing portfolio adjustments reflected in semi-annual reports through May 2025 and updated performance metrics as of September 30, 2025.