Cablevision Systems Corp. is close to an agreement to buy the Sundance Channel, jointly owned by General Electric Co.’s NBC Universal, CBS Corp., and actor Robert Redford, in a cash and stock deal valued at close to $500 million, according to people familiar with the negotiations.
Terms of the deal may be announced as early as Wednesday morning. The deal could be the first of two half-billion dollar purchases for Cablevision, based in Bethpage, N.Y. The cable operator has also made a bid …
