Sector ETF weakness: Heating Oil– UHN -4%. Oil– USO -3.3%. Gasoline– UGA...Dec. 24, 2008 12:49 PM ETUSO, GSG, UGA, UHNBy: Eli Hoffmann, SA News Editor Sector ETF weakness: Heating Oil– UHN -4%. Oil– USO -3.3%. Gasoline– UGA -2.7%. Commodities– GSG -2.3%. Recommended For YouMore Trending NewsSee More »Trending AnalysisTrending News