PDBC follows the DBIQ Optimum Yield Diversified Commodity Index Excess Return, “an index composed of futures contracts on 14 heavily traded commodities across the energy, precious metals, industrial metals and agriculture sectors,” according to PowerShares.

Most commodity-related exchange traded funds track a basket of futures securities. Consequently, investors should understand how the underlying futures markets work and the effects they will have on ETFs.

DBC and the United States Commodity Index Fund (NYSEArca: USCI) eschew rolling front month contracts, which can lead to underperformance, especially in a contangoed market. Instead, DBC targets futures contracts that offer the  highest implied roll yield while USCI rebalances each month and selects the most-backwardated contracts and then the seven highest-returning contracts.

DBC has seen year-to-date inflows of $203.5 million while investors have allocated $158 million to the PowerShares DB Agriculture Fund (NYSEArca: DBA). The PowerShares DB Agriculture Fund tries to reflect the performance of the Diversified Agriculture Index Excess Return, which is comprised of futures contracts on the most liquid and widely tracked agriculture commodities.

For more news and strategy on the Agriculture market, visit our Agriculture category.