The BCW Index gained 2 percent for the week ended Tuesday, as 15 of the 16 companies in the Index either gained ground or were flat for the period. The upswing was consistent with gains realized by tech stocks during the week.
Bruker Biosciences led gainers with a 5-percent increase, followed by PerkinElmer, which rose 4.4 percent. The only firm in the Index to lose ground for the trading period was Stratagene, whose shares dropped 8.5 percent.

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