Morning Market Movers

Idenix Pharmaceuticals (NASDAQ: IDIX) jumped 231.95% to $24.00 after Merck (NYSE: MRK) announced its plans to acquire Idenix for $24.50 per share in cash.

Achillion Pharmaceuticals (NASDAQ: ACHN) climbed 40.63% to $4.05 on news of Merck-Idenix deal.

Hittite Microwave (NASDAQ: HITT) shares surged 28.52% to $77.83 after Analog Devices (NASDAQ: ADI) announced its plans to buy Hittite Microwave for $78 per share in cash.

Kelly Services (NASDAQ: KELYB) shares jumped 37.45% to $25.62.

Family Dollar Stores (NYSE: FDO) shares gained 13.58% to $68.75 after Carl Icahn disclosed a brand-new 9.39% stake in the company.

Dollar General (NYSE: DG) shares surged 10.79% to $64.25 on news of Carl Icahn's 9.39% stake in Family Dollar Stores (NYSE: FDO).

The Hillshire Brands Company (NYSE: HSH) rose 4.74% to $61.71 after Tyson Foods (NYSE: TSN) announced it has submitted a unilaterally binding offer to buy Hillshire for $63 per share in cash.

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