Why Plug Power Stock Popped 5% This Morning -- Then Gave It All Back

Shares of hydrogen fuel cell company Plug Power (NASDAQ: PLUG) surged 5% in morning trading on the Nasdaq Thursday before turning tail and giving back all its gains -- and more. In 1:40 p.m. EDT trading, Plug stock is actually down nearly 2%.

So what happened?

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Source Fool.com