iShares Dow Jones U.S. Oil & Gas Exploration & Production Index Fund (NYSEArca: IEO)
iShares Dow Jones U.S. Oil Equipment & Services Index Fund (NYAR: IEZ)
PowerShares Dynamic Oil Services (NYSEArca: PXJ)
SPDR S&P Oil & Gas Exploration & Production (NYSEArca: XOP)
SPDR S&P Oil & Gas Equipment & Services (NYSEArca: XES)