Midday Losers; Vertex Pharmaceuticals Down 9%

Superior Energy Services

-14.96% after the announcement it will acquire Complete Production Services. Vertex Pharmaceuticals

-9.14% after one of its competitors announced trial news regarding a competing Hepatitis C drug. Sprint

-8.30% after the company announced on Friday that it may need to raise capital for network updates. The company was downgraded by multiple analyst firms today. Human Genome Sciences

-8.83% on heavy volume.