The E-TRACS UBS Bloomberg CMCI Sliver Index ETN (Ticker: USV) seeks investment results that correspond generally to the performance, before fees and expenses, of the UBS Bloomberg CMCI Silver Index Total Return. The index measures the collateralized returns from a basket of silver futures contracts. The commodity futures contracts are diversified across five constant maturities from three months up to three years. The ETN is issued by UBS AG.