Nasdaq cuts losses, briefly turns positive
Vertex Pharmaceuticals Inc was the top gainer on the Nasdaq 100 , climbing 9 percent to $43.86 after IMS Health said it was revising estimates of the number of prescriptions written in late September for Vertex's hepatitis C drug.
The Dow and S&P remained solidly lower after three days of gains as earnings from JPMorgan and soft economic data from China reinforced worries about a slowing global economy.
The Dow Jones industrial average was down 95.06 points, or 0.83 percent, at 11,423.79. The Standard & Poor's 500 Index was down 11.51 points, or 0.95 percent, at 1,195.74. The Nasdaq Composite Index was down 0.33 points, or 0.01 percent, at 2,604.40.
(Reporting by Ryan Vlastelica; Editing by Kenneth Barry)