Oil's rally leaves investors behind By: MarketWatch October 23, 2009 at 19:02 PM EDT Oil-linked exchange-traded funds have been posting solid gains, but these specialized funds are complex and risky instruments that don't fully capture oil-price moves. Read More >> Related Stocks: Exxon Mobil PowerShares DB Oil Fund United States 12 Month Oil Fund United States Gas Fund United States Oil Fund iPath Dow Jones-Goldman Sachs Crude Oil Fund