PowerShares WilderHill Progressive Energy Portfolio (the Fund) seeks investment results that correspond to the price and yield of the WilderHill Progressive Energy Index (the Index). The Index is comprised of the United States-listed companies that are involved in transitional energy bridge companies, with an emphasis on improving the use of fossil fuels. The Fund invests 80% of its total assets in common stocks of companies engaged in the progressive energy business. The Fund invests 90% of its total assets in common stocks that comprise the Index. The Index is comprised of approximately 46 companies, which are publicly traded in the United States, which benefit from the societal shift toward the transitional energy technologies in improving the use of fossil fuels and nuclear power. The investment adviser of the Fund is Invesco PowerShares Capital Management LLC.