Fuel cell products developer and manufacturer Ballard Power Systems (NASDAQ:BLDP) needs a win. Over the past year, BLDP stock has suffered a loss of 43%. On Tuesday, it tanked more than 4%. However, a recent company announcement coupled with rising interest in the underlying industry may bode well. It’s possible, then, that the dynamic could provide a swing-trade opportunity for bullish speculators. Recently, Ballard made news when it inked a deal with Solaris Bus & Coach, a leading European bus manufacture ...