Activist investor Carl Icahn revealed this morning that he has purchased an additional $500 million in Apple shares following Wall Street's disappointment with the company's earnings announcement yesterday. Apple's share price closed at $550 yesterday, before falling as low as $503 at open this morning. Just last week, Icahn announced that his share in Apple had passed $3 billion, then a day later he purchased another $500 million, and now, with the addition of today's shares, Icahn now
