NEW YORK - Vertex Pharmaceuticals Inc. shares jumped and helped lift the Nasdaq 100 index Monday, after the drug developer released positive data from a study of its experimental drug telaprevir, being developed to treat hepatitis C patients.
The index, which includes 100 of the largest nonfinancial securities listed on the Nasdaq Stock Market, gained 14.36 points to 1,781.93 in Thursday trading. The broader Nasdaq composite added 17.92 points to 2,279.10.
Vertex shares jumped $5.23, or 28 percent, to $23.89 after the Cambridge, Mass., company released the results.
Shares of SanDisk Corp. added $1.31, or 6.2 percent, to $22.57. A report from the Semiconductor Industry Association should Monday that global chip sales rose last month.
Shares of Discovery Holding Co., which runs the television channels Animal Planet and The Travel Channel, among others, rose $1.09, or 5.4 percent, to $21.22.
On the losing side, shares of Chinese advertising network operator Focus Media Holding Ltd. fell $2.07, or 5.6 percent, to $35.15.
Shares of Akamai Technologies Inc. shed $1.42, or 4.8 percent, to $28.16.
And shares of Citrix Systems Inc. lost $1.23, or 4 percent, to $29.33.

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