The PowerShares Dynamic Basic Materials Sector Portfolio (Fund) is based on the Dynamic Basic Materials Sector 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 comprised of stocks of 60 US basic materials companies. These are companies that are principally engaged in the business of producing raw materials, including paper or wood products, chemicals, construction materials, and mining and metals. The Fund and the Index are rebalanced and reconstituted quarterly in February, May, August and November.