 Navient Corp NASDAQ:NAVI shares were up 16.8 during mid-day trading on Tuesday . The stock traded as high as 7.60 and last traded at 7.08, approximately 3,787,515 shares changed hands during mid-day trading. An increase of 41 from the average daily volume of 2,686,507 shares. The stock had previously closed at 6.06. Several equities analysts ... 