Activist investor Carl Icahn said Wednesday he has raised his stake in Apple to $3 billion, and he took to Twitter to criticize the company's board.
In a CNBC interview Icahn called Apple a "no brainer."
"The point is that you don't have to be genius in technology to understand that Apple is selling at a 2014 consensus of 9 times earnings, and amazingly the S&P is selling at 17 times earnings and Apple is really growing," Icahn said in a "Fast Money Halftime Report" interview.
He added that in some ways, he was better off if the company did not increase its buyback, because the stock would remain cheap enough by his standards to buy more.