American Superconductor (NASDAQ: AMSC) is a green energy company, and helping electric grids "optimize network reliability, efficiency and performance" provides roughly 84% of the company's revenue, while providing control systems for wind turbines accounts for the remaining 16%. But did you know that in its spare time, American Superconductor also moonlights as a defense stock?

I know. I was as surprised as you to hear this. But it's true.

It's also the reason American Superconductor stock is up 8.7% through 1 p.m. ET today.

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Source Fool.com