Sector ETF weakness after first hour: Energy– XLE -2.5%. Coal– KOL -2.4%....Jul. 31, 2008 10:32 AM ETXLE, IYE, UNG, KOL, UHNBy: Eli Hoffmann, SA News Editor Sector ETF weakness after first hour: Energy– XLE -2.5%. Coal– KOL -2.4%. Energy– IYE -2.2%. Heating Oil– UHN -2%. Natural Gas– UNG -2%. Recommended For YouMore Trending NewsSee More »Trending AnalysisTrending News