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The PowerShares DB Commodity Index Tracking Fund seeks to track changes, whether positive or negative, in the level of the DBIQ Optimum Yield Diversified Commodity Index Excess Return™ ("DB Commodity Index" or the "Index") plus the interest income from the Fund's holdings of U.S. Treasury securities less the Fund's expenses. DB Commodity Services LLC serves as the Managing Owner of the Fund. The Fund is designed for investors who want a cost-effective and convenient way to invest in commodity futures. The Index is a rules-based index composed of futures contracts on 14 of the most heavily traded and important physical commodities in the world. The Fund and the Index are rebalanced and reconstituted annually in November. This Fund is not suitable for all investors due to the speculative nature of an investment based upon the Fund’s trading which takes place in very volatile markets. Because an investment in futures contracts is volatile, such frequency in the movement in market prices of the underlying futures contracts could cause large losses. Please see "Important Considerations" and the Prospectus for additional risk disclosures.