CBS posts loss in 1st quarter as advertising revenue fallsLOS ANGELES — CBS Corp., the media company controlled by billionaire Sumner Redstone, said Thursday it lost $55 million in the first quarter as advertising revenues fell sharply. CBS posts loss in 1st quarter as ad revenue falls; CEO Moonves sees ‘improvement’ in ad buysLOS ANGELES — CBS Corp., the media company controlled by billionaire Sumner Redstone, said Thursday it lost $55 million in the first quarter as advertising revenue fell sharply. |