NEW YORK: Stocks that moved heavily or traded substantially Friday: Roku, up $19.84 to $399.13 The company bought the video library of Quibi, the short-lived streaming service, to bolster its ad-supported channel. Sarepta Therapeutics, down $86.66 to $82.29 The drug developer reported mixed study results for a potential muscular dystrophy treatment. comScore, up 45 cents to $3.29 The media.
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