Biggest Losers as of 11am

Riverbed Tech RVBD is trading over 22% lower after the company's revenue missed estimates. Fortinet FTNT is trading over 21% lower after releasing earnings. Lufkin Industries LUFK is trading over 20% lower after reducing 2011 output forecast. Hanesbrands HBI is trading almost 8% lower after releasing Q2 earnings. Ecolab ECL is trading roughly 7.75% lower after announcing intentions to purchase Nalco. Vonage Holdings VG is trading almost 6% lower. Yahoo! YHOO is trading over 5.30% lower after the company's sales missed estimates.