Shares in Sequenom dropped 9.2 percent for the five-day trading week ended Tuesday to lead all decliners in the BCW Index. It was the second week in a row that Sequenom’s shares lost value, though there has been no recent news regarding the firm. Sequenom filed a prospectus earlier this year for the possible sale of common shares.
Bruker BioSciences led gainers for the week with a 5 percent jump in its stock. Bruker’s stock has been trading near its 52-week high of $11.36.

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