Old Westbury Municipal Bond Fund (OWMBX) is a mutual fund managed by Old Westbury Funds, Inc., that seeks high current income exempt from federal income tax through investment primarily in a diversified portfolio of municipal securities issued by U.S. states, territories, and political subdivisions. The fund offers shares in a no-load class with a focus on investment-grade municipal bonds, including general obligation bonds, revenue bonds, and notes; it may also invest in pre-refunded bonds, zero-coupon municipal securities, and derivative instruments such as futures and swaps for hedging or income enhancement purposes. Geographically, it targets municipal obligations across the United States, with a preference for high-quality, short- to intermediate-term maturities to manage interest rate risk and maintain liquidity. Established in 2005 and domiciled in Wilmington, Delaware, with administrative operations linked to New York-based Old Westbury management, the fund operates within the municipal bond segment serving tax-sensitive individual and institutional investors. In recent developments, the fund maintained its strategy amid 2024 market volatility, with no major portfolio restructurings or name changes reported; however, it benefited from broader Old Westbury platform enhancements, including strengthened compliance frameworks following regulatory updates in fixed-income disclosures.