The fund primarily allocates a minimum of 80% of its total assets to municipal securities, which generate income that is exempt from federal income tax. Its portfolio may include debt instruments issued by various entities, such as state and local government bodies, organizations linked to the U.S. government, and, in certain cases, private issuers. Furthermore, the fund has the flexibility to invest in structured municipal debt products like mortgage-backed securities (MBS) and asset-backed securities (ABS).