PTC Therapeutics, Inc. (NASDAQ:PTCT – Get Free Report) shares shot up 6.1% during trading on Monday . The company traded as high as $30.49 and last traded at $30.30. 137,088 shares traded hands during mid-day trading, a decline of 86% from the average session volume of 960,482 shares. The stock had previously closed at $28.57. […]