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The Incredible Power Of A Carl Icahn Tweet

Julia La RocheAug 14, 2013, 01:16 IST

This stock chart shows the power of Twitter. Or perhaps just the power of a billionaire on Twitter.

At 2:21 p.m. ET, legendary investor Carl Icahn Tweeted that he has a huge stake in Apple and then the stock ripped.

The 77-year-old investor added more than $17.26 billion to Apple's market cap this afternoon.

The stock was last trading around $494 a share with 908.5 million shares outstanding. The stock was trading around $475 pre Tweet.

Check out the chart:

Yahoo! Finance