The PowerShares Energy Exploration & Production Portfolio (Fund) is based on the Dynamic Energy Exploration & Production IntellidexSM Index (Intellidex Index). The Fund will normally invest at least 90% of its total assets in common stocks that comprise the Index. The Intellidex Index thoroughly evaluates companies based on a variety of investment merit criteria, including: price momentum, earnings momentum, quality, management action, and value. The Underlying Intellidex Index is composed of stocks of 30 U.S. companies involved in the exploration and production of natural resources used to produce energy. These companies are engaged principally in exploration, extraction and production of crude oil and natural gas from land-based or offshore wells. These companies include petroleum refineries that process the crude oil into finished products, such as gasoline and automotive lubricants, and companies involved in gathering and processing natural gas, and manufacturing natural gas liquid. The Fund is rebalanced and reconstituted quarterly in February, May, August and November.