Sector ETF weakness: Coal– KOL -5.3%. Gasoline– UGA -3.4%. Oil Services– OIH...Jul. 31, 2008 2:28 PM ETXLE, OIH, SLX, KOL, UGABy: Eli Hoffmann, SA News Editor Sector ETF weakness: Coal– KOL -5.3%. Gasoline– UGA -3.4%. Oil Services– OIH -3.3%. Energy– XLE -3.1%. Steel– SLX -2.8%. Recommended For YouMore Trending NewsSee More »Trending AnalysisTrending News