Image credit:Wikipedia Creative Commons By Jason Zweig and Tom McGinty | Dec. 6, 2012 10:06 a.m. ET The stock of Iridex Corp. , a maker of lasers used to treat visual ailments, had been hovering around $3.43 all day on June 29. At 3:55 p.m., five minutes before the market close, it took off. It moved to $3.65, then $3.80. Less than a half...
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