Wall Street has a short leash for Viacom's Philippe Dauman

Viacom lead outside shareholder Mario Gabelli believes that Chief Executive Philippe Dauman should get another six months to save his job -- but the rest of Wall Street seems to want to put the 62-year-old boss on a much shorter leash. Since Viacom founder Sumner Redstone sapped Dauman's power last Friday by tossing him from...