BlackRock Build America Bond Trust (the Trust) is a non-diversified, closed-end management investment company. The Trust's primary investment objective is to seek high current income, with a secondary objective of capital appreciation. The Trust seeks to achieve its investment objectives by investing primarily in a portfolio of taxable municipal securities known as Build America Bonds (BABs). The Trust will invest at least 80% of its managed assets in BABs. The Trust may invest up to 20% of its managed assets in securities other than BABs, including taxable municipal securities, the United States Treasury securities and obligations of the United States Government and its agencies. The Trust will invest at least 80% of its managed assets in securities that at the time of investment are investment-grade quality. BlackRock Advisors, LLC (BlackRock Advisors or the Advisor) serves as the Trust's investment advisor.