The PowerShares Emerging Markets Infrastructure Portfolio (Fund) is based on the S-Network Emerging Infrastructure Builders IndexSM</SUP> (Index). The Fund will normally invest at least 90% of its total assets in securities that comprise the Index and American depositary receipts and global depositary receipts based on the securities in the Index. The Index is designed to measure the overall performance of securities of companies involved in infrastructure construction and development in emerging market countries. Industries include, but are not limited to, construction and engineering, construction machinery, construction materials, diversified metals and mining, heavy electrical equipment, industrial machinery and steel. The Fund is rebalanced and reconstituted quarterly.