Social Media Punished as Results Fall Short - NYTimes.com

An anti-social week on Wall Street; in contrast, see Facebook is about to pass 1.5 billion active users—and 2 billion is within sight (Quartz)

"LinkedIn on Thursday plunged as much as 25 percent in after-hours trading after the professional social networking company forecast second-quarter sales that were weaker than Wall Street estimates.

The drop followed the declines of two other social networking companies. Twitter shares are down around 25 percent this week after the company reported quarterly sales that fell short of expectations, while local reviews site Yelp plummeted 23 percent on Thursday, a day after it too posted sales that disappointed Wall Street."

Social Media Punished as Results Fall Short - NYTimes.com