Shares of Vertex Pharmaceuticals (VRTX -8.5%) move lower on heavy volume after Pharmasset (VRUS...

|About: Vertex Pharmaceuticals In... (VRTX)|By:, SA News Editor

Shares of Vertex Pharmaceuticals (VRTX -8.5%) move lower on heavy volume after Pharmasset (VRUS +6.4%) announces further expansion of its Hepatitis C treatment trial, stinging prospects for the company's own line.