Ichan Creating a New Trend in Investment Tweets

He reveals via Twitter that he has a position in Apple:

We currently have a large position in APPLE. We believe the company to be extremely undervalued. Spoke to Tim Cook today. More to come.
— Carl Icahn (@Carl_C_Icahn) August 13, 2013

The stock is currently up $16.02 per share to $483.55 a gain of 3.40%.

UPDATE:

Here's a follow up tweet from Ichan. He is breaking more ground and using Twitter as a stock activist platfrom:

Had a nice conversation with Tim Cook today. Discussed my opinion that a larger buyback should be done now. We plan to speak again shortly.
— Carl Icahn (@Carl_C_Icahn) August 13, 2013