The PowerShares DB US Dollar Bearish Fund (Ticker: UDN) seeks investment results that correspond generally to the performance, before fees and expenses, of the Deutsche Bank Short US Dollar Index Futures Index. The index, which is managed by DB Commodity Services LLC, is a rules-based index composed solely of short USDX futures contracts. The USDX futures contract is designed to replicate the performance of being short the US Dollar against the following currencies: Euro, Japanese Yen, British Pound, Canadian Dollar, Swedish Krona and Swiss Franc.