21st Century Fox announced that their offer to buy Time Warner was rebuffed today. If the deal were to go through it would bring together two of the world's most powerful media conglomerates. Time Warner's shares rose 17.3% to $83.33 on the New York Stock Exchange after news spread that Rupert Murdoch was interested in buying the company. Murdoch's offer was worth $80 billion, or $85 a share, 60% in stock and the rest in cash.