Proshares Ultra DJ-UBS Crude Oil shares are currently trading down about 8% on the day.

FORBES: UCO Crosses Critical Technical Indicator

Right now, the only sugar ETP available is iPath DJ-UBS Sugar TR Sub-Index ETN ( SGG).

FORBES: SGG Is A Sweet Buy

Proshares Ultra DJ-UBS Crude Oil shares are currently trading off about 2.1% on the day.

FORBES: UCO Crosses Critical Technical Indicator

The iPath DJ-UBS Copper Total Return Sub-Index ETN ( JJC) is the most liquid of the exchange traded products that follow copper prices.

FORBES: 2 Ways to Play Copper's Seasonal Strength

The note, which was created in March 2008, is similar to the iPath DJ-UBS note in that it takes long positions in agricultural futures, tracks the UBS Bloomberg CMCI Food Index and is heavily weighted towards sugar, soybeans and corn.

FORBES: Investors Finding Big Gains on Farms