Ballard Power Systems Inc. (NASDAQ:BLDP – Get Rating) (TSE:BLD) traded down 12% during mid-day trading on Monday . The stock traded as low as $5.90 and last traded at $5.96. 237,852 shares were traded during trading, a decline of 95% from the average session volume of 4,709,485 shares. The stock had previously closed at $6.77. […]