Why Plug Power (PLUG) Stock Is Rallying Today

NEW YORK (TheStreet) -- Plug Power (PLUG) continued to rally from last week's downswing, and is currently up 2.75% to $7.09.

The company's fuel cell supplier, Ballard Power Systems (BLDP), is reportedly in position to report the first profit in its history.

The alternative energy system company has served as a bellwether for the entire sector. Strong performances by Plug are often followed by strong performances from other companies in the industry. Still, the stock has experienced some extreme volatility this year.

Must read: Warren Buffett's 10 Favorite Stocks

Over the last month, Plug's stock has gone from a low of $4.64 on February 26 to a high of $11.41 on March 10. Now it's gaining again.

There continues to be a lot of uncertainty as to the viability of hydrogen fuel cells as an energy source. Proponents of the technology see it as a practical alternative energy solution, while naysayers see the technology as underdeveloped and not a viable option in the short term.

TheStreet Ratings team rates PLUG POWER INC as a Sell with a ratings score of D-. TheStreet Ratings Team has this to say about their recommendation:

"We rate PLUG POWER INC (PLUG) a SELL. This is driven by some concerns, which we believe should have a greater impact than any strengths, and could make it more difficult for investors to achieve positive results compared to most of the stocks we cover. The company's weaknesses can be seen in multiple areas, such as its deteriorating net income and weak operating cash flow."

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