Shares in Bruker Biosciences rose 5.8 percent for the trading week ended Tuesday to lead the BCW Index to a modest gain. The firm did not report any news and trading volume was slightly lower than average for the week. Stratagene led decliners with a 4.5-percent drop for the tracking period. The firm announced last week that it had posted a $21-million bond to secure damages in its legal dispute with Third Wave Technologies (see Briefs).

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