PowerShares Build America Bond Portfolio (the Fund) seeks investment results that correspond generally to the price and yield performance of an index called The BofA Merrill
Lynch Build America Bond Index (the Index). The Fund will normally invests at least 80% of its total assets in the securities that comprise the Index. The Index is designed to track the performance of the United States dollar-denominated Build America Bonds publicly issued by the United States and territories, and their political subdivisions, in the United States market. The investment advisor of the Company is Invesco PowerShares Capital Management LLC.