PowerShares Aerospace & Defense Portfolio (Fund) seeks investment results that correspond generally to the price and yield of the SPADE Defense Index (the Index). The Index is designed to identify a group of companies involved in the development, manufacturing, operations and support of the United States defense, homeland security and aerospace operations. The modified market-cap portfolio is rebalanced quarterly and reconstituted annually. The Fund will normally invest at least 90% of its total assets in common stocks that comprise the Index. The Fund’s investment advisor is Invesco PowerShares Capital Management LLC.