The shares of Alcoa Corp (NYSE:AA) are sliding today, after news that the company is aiming to buy Alumina for 2.2billioninanall−stockdeal.DroppingaluminumpricesaredentingAlumina,andthemergerwouldprovidetaxadvantagestoboth. Atlastglance,AAwasdown2.925.75, earlier as low as $24.86 -- its lowest level since mid December. The stock is below all moving averages between the 20-day and 320-day, with recent pressure from the former. Since last February, the equity is down 44.8%. Op ...