Among the worst likely performers ahead, nickel and copper estimates were lowered 23% and 16%, respectively, by the investment bank. Additionally, the bank cut its 2015 forecasts for aluminum by 12%.

For broad base metal exposure, the PowerShares DB Base Metals Fund (NYSEArca: DBB), which equally divides its weight in aluminum, copper and zinc, has dipped 1.1% year-to-date. Alternatively, for targeted exposure, the iPath Dow Jones-UBS Copper Subindex Total Return ETN (NYSEArca: JJC) is up 2.2% so far this year while the iPath Dow Jones-UBS Nickel Total Return Sub-Index ETN (NYSEArca: JJN) has declined 4.9% and the iPath Dow Jones-UBS Aluminum Subindex Total ReturnSM ETN (NYSEArca: JJU) decreased 2.1%.

PowerShares DB Commodity Index Tracking Fund

For more information on the commodities market, visit our commodity ETFs category.

Max Chen contributed to this article.

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