BTT is a mutual fund that aims to provide investors with exposure to municipal bonds maturing in 2030. It is managed by BlackRock, a leading investment management company, and offers investors the potential for tax-free income. The fund has a target term structure, meaning it will terminate in 2030, providing investors with a defined investment timeline. BTT is a beneficial interest trust, which means that investors hold a beneficial interest in the underlying assets of the fund. This mutual fund may be suitable for investors seeking a tax-efficient, fixed-income investment with a specific maturity date.