Shares in both Third Wave Technologies and Sequenom rose sharply in the past five trading days, though neither firm reported any news. Third Wave climbed 17.25 percent to close at $5.98 for the trading period ended Tuesday. Shares in Sequenom, which was the focus of a brief article Monday on the influential investing site The Motley Fool, rose 11.3 percent to close at $3.94.
Only three firms in the BCW Index lost value for the week, led by Bruker BioSciences, which fell 3.26 percent.

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