Consumers often hate their cable company. Sometimes investors do too. After disappointing earnings, the loss of a star COO, and fears of customers abandoning their subscriptions, shares of Cablevision, the New York-based cable operator, have fallen 19% over six months to trade near a two-year low. (Shares are down 61% over the past year, though that doesn’t count the value shareholders received when Cablevision spun off AMC Networks.)