Pioneer High Income Trust (the Trust) is a diversified closed-end management investment company. The Trust invests at least 80% of its assets in below investment grade (high-yield) debt securities, loans and preferred stocks. The Trust's portfolio includes corporate bonds and notes, convertible bonds and notes, senior secured floating rate loan interests, tax exempt obligations, temporary cash investments, common stocks, asset backed securities, preferred stocks, sovereign debt obligations, collateralized mortgage obligations, convertible preferred stock and municipal collateralized debt obligation. The Trust may invest up to 50% of its total assets in illiquid securities. Pioneer High Income Trust's investment advisor is Pioneer Investment Management, Inc.