Dave Knott (2917251) writes The media giant 21st Century Fox, the empire run by Rupert Murdoch, made an $80 billion takeover bid in recent weeks for Time Warner Inc. but was rebuffed. Time Warner on Wednesday confirmed that it had rejected a cash and stock offer from 21st Century Fox, saying that it was not in the company's best interests. Time Warner's board discussed the proposal at length and early this month it sent a terse letter rejecting the offer, saying the company was better off remaining independent. A Time Warner statement pointed to its own strategic plan, what it said was "uncertainty" over the value of 21st Century Fox stock and regulatory risks as among the reasons for its rebuff. The company said that 21st Century Fox had offered a premium of roughly 22 percent to Time Warner's closing price on Tuesday. Shares of Time Warner were up about 20 percent in premarket trading on Wednesday morning. The combined company would have total revenue of $65 billion.