Shares in Sequenom sank by double digits for the second week in a row to lead all decliners in the BCW Index for the week ended Tuesday. Sequenom dropped 12.08 percent for the week, following a drop of 13.24 percent the week before. Though the firm has not revealed any bad news recently, Lehman Brothers dumped 1 million shares of Sequenom stock last week at a price of $4.55 per share.
Beckman Coulter led all gainers for the week with a 6.62 percent rise, followed by Illumina, which closed up 5.67 percent.

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