In U.S. financial law, a unit investment trust (UIT) is an investment product offering a fixed (unmanaged) portfolio of securities having a definite life. Unlike open-end and closed-end investment companies, a UIT has no board of directors. A UIT is registered with the Securities and Exchange Commission under the Investment Company Act of 1940 and is classified as an investment company. UITs are assembled by a sponsor and sold through brokerage firms to investors. Types A UIT portfolio may contain one of several different types of securities. The two main types are stock (equity) trusts and bond (fixed-income) trusts. Unlike a mutual fund, a UIT is created for a specific length of time and is a fixed portfolio: its securities will not be sold or new ones bought except in certain limited situations (for instance, when a company is filing for bankruptcy or the sale is required because of a merger). Stock trusts Stock trusts are generally designed to provide capital appreciation and/or dividend income. They usually issue as many units (shares) as necessary for a set period of time before their primary offering period closes. Equity trusts have a set termination date, on which the trust liquidates and distributes its net asset value as proceeds to the unitholders. (The unitholders may then have special options for the reinvestment of this principal.) Bond trusts Bond trusts issue a set number of units, and when they are all sold to investors, the trust's primary offering period is closed. Bond trusts pay monthly income, often in relatively consistent amounts, until the first bond in the trust is called or matures. When this occurs, the funds from the redemption are distributed to the clients via a pro-rata return of principal. The trust then continues paying the new monthly income amount until the next bond is redeemed. That continues until all the bonds have been liquidated out of the trust. Bond trusts are generally appropriate for clients seeking current income and stability of principal. Legal status and documents A UIT may be constituted as either a regulated investment company (RIC) or a grantor trust. A RIC is a trust, corporation or partnership in which investors have common investment and voting rights but do not have direct interest in investments of the investment company or fund. A grantor trust, in contrast, grants investors proportional ownership in the underlying securities. A UIT is created by a