Social media stocks tumble on tepid Facebook IPO; Zynga, Yelp hit all-time lows

by Andrea Kramer 5/17/2012 9:14 AM Wall Street freshman Yelp Inc. (YELP - 21.60) was a fan favorite among eleventh-hour call buyers yesterday. During the course of the session, the online business-review concern saw close to 4200 calls change handsFacebook's IPO is dragging down the share prices of Zynga, Yelp, Renren, LinkedIn and Pandora Media.Yelp employees who plan on bringing their canine to work better be careful, especially its CEO Jeremy Stoppelman, who's been photographed about a million times with his adorable dog

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