DTO, the PowerShares DB Crude Oil Double Short ETN acts as an inverse ETN by tracking (in the opposite direction) the price of the Deutsche Bank Liquid Commodity index - Optimum Yield Oil Excess Return. The oil ETN gives investors the opportunity to take a position in the performance of crude oil, however the position will be opposite of the underlying index. For example, as the price of the index rises, the price of DTO falls and vice versa. The ETN itself consists of futures contracts on light sweet crude oil.
If you'd like to see more related funds, here is a thorough list of oil ETFs. A List of Major Oil ETFs and ETNs
If you'd like to see more inverse ETFs, here is a thorough list of inverse ETFs and ETNs.
Or if you are more interested in energy investments, here is a List of Energy ETFs.
