Shares of Alkermes plc (NASDAQ:ALKS – Get Free Report) rose 7.2% during trading on Thursday . The stock traded as high as $30.40 and last traded at $30.00. Approximately 759,412 shares changed hands during mid-day trading, a decline of 49% from the average daily volume of 1,484,791 shares. The stock had previously closed at $27.99. […]