Pfizer Inc. (NYSE:PFE – Get Free Report) shares traded up 1% during mid-day trading on Wednesday . The stock traded as high as $28.72 and last traded at $28.66. 8,367,983 shares traded hands during mid-day trading, a decline of 80% from the average session volume of 42,763,281 shares. The stock had previously closed at $28.38. […]