Shares in Luminex dropped 9 percent for the five-day trading period ended Tuesday. The firm’s shares have declined 13 percent since closing at $14.35 on May 2, the day it released its first-quarter results, which included a 28 percent gain in revenues but a 75 percent drop in profit year over year. Luminex led the 10 stocks that lost value during the trading period.
 
Bruker BioSciences reversed a two-week skid in its share price and closed up 8 percent for the week.
 

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