Pre-Market Movers: AAPL, GM, THS Pre-Market Movers No. 3, TREE: Shares of TreeHouse Foods Inc. ( THS ) were up about 1.3% on news that company may purchase the Ralcorp snack-making unit of food manufacturer ConAgra Foods Inc. (NYSE: CAG ) for roughly $2.7 billion. In addition, Mario Draghi, the head of the European Central Bank, hinted his monetary policy team may slash interest rates and/or extend their bond-purchasing program in order to boost inflation and the world's largest economic bloc.