When tweets move markets: Icahn and Apple

Tuesday, 13 Aug 2013 | 4:28 PM ET
Tim Cook and Carl Icahn
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Tim Cook and Carl Icahn

Billionaire investor Carl Icahn revealed on Twitter on Tuesday that he's taken a "large position" in Apple.

"We believe the company to be extremely undervalued," Icahn said—a tweet that instantly moved the market.

In the modern era of social media, a brief comment—offhand or not—has the power to make or lose millions of people billions of dollars in an instant.

Read on for more reactions to Icahn's tweets:

  • Matt Hunter is the senior technology editor at CNBC.com.

  • Cadie Thompson is a tech reporter for the Enterprise Team for CNBC.com.

  • Working from Los Angeles, Boorstin is CNBC's media and entertainment reporter and editor of CNBC.com's Media Money section.

  • Jon Fortt is an on-air editor. He covers the companies, start-ups, and trends that are driving innovation in the industry.

  • Lipton is CNBC's technology correspondent, working from CNBC's Silicon Valley bureau.

  • Mark is CNBC's Silicon Valley/San Francisco Bureau Chief covering technology and digital media.