Shares in Affymetrix dropped 9 percent for the five-day trading period ended Tuesday. The firm’s stock has been fluctuating between nearly $27 per share and $24 per share for the past couple of months. On Tuesday, Affy’s stock closed at $24.44, its lowest point since closing at $24.21 on May 17.
 
Shares in Caliper Life Sciences rose 8.7 percent for the tracking period. The firm’s stock has risen steadily over the past three weeks.
 

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