Shares in Sequenom and Affymetrix rose 5.8 percent and 5.1 percent, respectively, to lead gainers in the BCW Index for the four-day trading week ended Tuesday. There was no trading in the US on Monday due to the Memorial Day holiday. It was the second week in a row that Sequenom posted a significant increase in its share price.
Caliper Life Sciences led the 17 stocks that declined for the trading period, falling 5.8 percent.

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