See Key PowerShares DB Base Metals Fund (DBB) This PowerShares DB Base Metals Fund (NYSE: DBB ) seeks to track the price and yield performance of the Deutsche Bank Liquid Commodity Index - Optimum Yield Industrial Metals Excess Return. Top ETFs to Buy Now In addition to political changes in the Middle East and North Africa, along with the continuing threat of European debt contagion, the recent earthquake and tsunami in Japan add more pressure to the prospects of long-term inflation. Holdings include futures contracts of cocoa, sugar, coffee, live cattle, soybean, corn, wheat, lean hogs, etc.