Search engine giant Google has seen its shares rise above the $600 mark for the first time, with investors confident ahead of third-quarter earnings.Shares traded as high as $610.26 on Monday, before closing at $609.62.
Since going public in August 2004, Google's stock has risen sharply from its original price of $85 a share.
The firm has tapped into growing sources of revenue from advertisers who are turning away from more traditional media including TV and print.
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