iPath Dow Jones UBS Sugar Total Return Subindex ETN ( SGG) -0.4% Sugar has risen steeply throughout the week as supply concerns are met with increasing demand. On Friday, however, the sweetener took a slight break from its ascension. A day like Friday highlights the stable nature of diversified agriculture products such as the PowerShares DB Agriculture Fund ( DBA). DBA is trading flat today. Conservative investors with a desire for agriculture futures exposure should pick DBA over a single commodity fund. All prices as of 2:15 PM EST Written by Don Dion in Williamstown, Mass.