Yelp's growth prospects trumped concerns over a possible flood of shares on Aug. 29, when a ban on stock sales by early investors expired. The online reviewer's stock surged as much as 23 percent, to $22.40, defying expectations that Yelp would follow Facebook, Groupon, and Angie's List, whose shares all sank to record lows after lockups ended. Yelp is adding mobile features and working with Apple to put its reviews into the iPhone and iPad-moves that may help drive the 63 percent sales increase analysts expect this year.
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