Definition:
DBB, the PowerShares DB Base Metals ETF tracks the price of the Deutsche Bank Liquid Commodity Index - Optimum Yield Industrial Metals Excess Return. The index consists of futures contracts on liquid and widely used base metals. Some of those include aluminum, copper and zinc. The underlying index follows the performance of the industrial metals sector.
If you'd like to see more related funds, here is a thorough list of precious metals ETNs and ETFs. A List of Gold ETFs
