ETF weakness: Livestock– COW -1.1%, Biotech– IBB -1.0%, Retailers– RTH -0.7%,...Aug. 27, 2008 10:21 AM ETIBB, RTH, RKH, KBE, COWBy: Rachael Granby, SA News Editor ETF weakness: Livestock– COW -1.1%, Biotech– IBB -1.0%, Retailers– RTH -0.7%, Regional Banks– RKH -0.7%, Commercial Banks– KBE -0.6% Recommended For YouMore Trending NewsSee More »Trending AnalysisTrending News