Unit Investment Trust 

Investment funds created with a fixed portfolio of investments that never changes over the life of the trust. They are created by brokerage houses, and are liquidated as investments within the trust are paid off. They provide a steady, periodic flow of income to investors.

Remarks: Bond funds including mutual funds (open-end and closed-end, actively managed and indexed), exchange-traded funds and unit investment trusts offer a convenient and affordable way to invest in a diversified portfolio of bonds, but a bond fund investment can differ from a bond investment in ways that are important to understand.