When a company falls over 10% since the release of earnings, it normally means that the news wasn't good at all. If you look deeper at Ballard Power Systems(NASDAQ:BLDP) earnings numbers, though, there is one thing that should give investors promise: its growing margins. By lowering cash costs and improving its gross margins to 25% -- a figure that other fuel cell-oriented companies like FuelCell Energy (NASDAQ:FCEL) and Plug Power (NASDAQ:PLUG) are a far ways off from achieving -- it was able to post its closest EBITDA break-even numbers to date.

But of course shares are down for a reason, and there were some less encouraging signs in this earnings report as well. Find out what is the most concerning issue by tuning into the video below. 

Tyler Crowe has no position in any stocks mentioned. You can follow Tyler at Fool.com under the handle TMFDirtyBird, on Google +, or on Twitter @TylerCroweFool.

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