The PowerShares DB Agriculture Double Short ETN (Ticker: AGA) seeks investment results that correspond to the INVERSE (opposite) of the monthly performance of the Deutsche Bank Liquid Commodity Index - Optimum Yield Agriculture. The index is composed of futures contracts on four agricultural commodities and weighted as such: Corn (25%), Soybeans (25%), Sugar (25%) and Wheat (25%). Throughout the year the precise weighting of each commodity in the index will change based upon price changes. The index is rebalanced annually to the base weights every November. Selection of contracts is determined based on the best possible implied roll yield for each eligible futures contract. The DB Commodity ETNs are unsecured debt securities issued by Deutsche Bank AG, London Branch.