 American Shared Hospital Services NYSEAMERICAN:AMS shot up 43.9 during mid-day trading on Wednesday . The stock traded as high as 3.42 and last traded at 3.10, 3,428,846 shares traded hands during mid-day trading. An increase of 7,141 from the average session volume of 47,351 shares. The stock had previously closed at 2.16. American Shared Hospital ... 