The investment seeks to track changes, whether positive or negative, in the level of the Deutsche Bank Liquid Commodity index--Optimum Yield Diversified Excess Return. The fund will pursue its investment objective by investing in a portfolio of exchange-traded futures on the commodities comprising the index, or the index commodities. The index commodities are light, Sweet Crude Oil (WTI), Heating Oil, RBOB Gasoline, Natural Gas, Brent Crude, Gold, Silver, Aluminum, Zinc, Copper Grade A, Corn, Wheat, Soybeans, and Sugar. The index is composed of notional amounts of each of the index commodities.