<p>This stock chart shows the power of <keyword id="6354616" type="CITY" weightage="60" keywordseo="Twitter">Twitter</keyword>. Or perhaps just the power of a billionaire on Twitter.</p>
<p>At 2:21 p.m. ET, legendary investor <a href="http://www.businessinsider.com/carl-icahn-large-position-in-apple-2013-8">Carl Icahn Tweeted that he has a huge stake in Apple</a> and then the stock ripped. </p>
<p>The 77-year-old investor added more than $17.26 billion to <keyword id="6354427" type="CITY" weightage="60" keywordseo="Apple">Apple</keyword>'s market cap this afternoon. </p>
<p>The stock was last trading around $494 a share with 908.5 million shares outstanding. The stock was trading around $475 pre Tweet. </p>
<p>Check out the chart: </p>
<p><div class="image-container display-table"><div><div class="image"><img src="http://static1.businessinsider.com/image/520a8c0beab8eadb19000006-606-447/screen shot 2013-08-13 at 3.35.05 pm.png" border="0" alt="apple" /><p class="source">Yahoo! Finance</p></div></div></div></p>

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BusinessInsider

The Incredible Power Of A Carl Icahn Tweet

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

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

The Incredible Power Of A Carl Icahn Tweet

Julia La Roche

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