The BCW Index rose .6 percent for the five-day trading period ended Tuesday. Though only a slight gain, it performed better than the Dow Jones Industrial Average, Nasdaq, and Nasdaq Biotech Index which fell .1 percent, .8 percent, and 1.4 percent, respectively.
PerkinElmer led gainers with a 3.5 percent rise, followed by Qiagen, which climbed 3.2 percent, and Bio-Rad, which closed up 3 percent. Millipore had the sharpest drop, finishing the tracking period down 1.6 percent.

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