Although we don't believe in timing the market or panicking over market movements, we do like to keep an eye on big changes -- just in case they're material to our investing thesis.

What: Shares of FuelCell Energy (NASDAQ:FCEL) jumped as much as 14.6% today after the company reported earnings.

So what: Revenue rose 81% in the most recent quarter to $53.7 million and net loss fell to $5.6 million, or $0.03 per share. The company also announced a partnership with NRG Energy (NYSE:NRG), who will market fuel cells to larger end users who can either buy a system or fuel cell power from NRG.  

Now what: The earnings report was solid but the NRG partnership may be even bigger news today. The investment thesis in FuelCell revolves around the company growing revenue quickly and there may not be a better partner than the largest independent power supplier in the country. I'm not buying the stock today just based on expected losses well into next year but if FuelCell flips to a profit earlier than expected I'll reevaluate the stock.

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This article represents the opinion of the writer, who may disagree with the “official” recommendation position of a Motley Fool premium advisory service. We’re motley! Questioning an investing thesis -- even one of our own -- helps us all think critically about investing and make decisions that help us become smarter, happier, and richer.