What happened The stock of Plug Power (NASDAQ: PLUG) charged to a 9.9% gain as of 10:10 a.m. EDT Thursday. There being no other news of note today, you can probably thank British banker Barclays Capital for that. This morning, Barclays announced it is initiating coverage of the fuel cell pioneer with an overweight rating and a $7 price target, according to TheFly.com. A hydrogen fuel cell. Image source: Getty Images. So what In its report, Barclays describes Plug as a leading player among the few renewable energy pure plays that are both publicly traded and also viable alternatives to traditional energy sources such as oil. The analyst says it sees a "long-term growth narrative" with "multiple points of inflection over the coming years" that could transform Plug Power into a growth stock. Now what Which is not to say that growth has been lacking in Plug Power stock even before Barclays' recommendation. In fact, shares have gained some 63% over the past year. And yet I have to wonder whether Plug's performance, even combined with Barclays' recommendation, is a strong enough case for expecting even more gains in the years to come. Why not? Recall that Plug Power hasn't earned a profit, ever. To the contrary, its history is one of 23 straight years of uninterrupted losses. Granted, according to data from S&P Global Market Intelligence, analysts forecast that Plug will in fact finally turn profitable in 2023. Then again, predictions of profitability for Plug have been made before. They didn't pan out. Based on Plug's record, I have serious doubts that this one will, either. 10 stocks we like better than WalmartWhen investing geniuses David and Tom Gardner have an investing tip, it can pay to listen. After all, the newsletter they have run for over a decade, Motley Fool Stock Advisor, has tripled the market.* David and Tom just revealed what they believe are the ten best stocks for investors to buy right now… and Walmart wasn't one of them! That's right -- they think these 10 stocks are even better buys. See the 10 stocks Stock Advisor returns as of 2/1/20Rich Smith has no position in any of the stocks mentioned. The Motley Fool has no position in any of the stocks mentioned. The Motley Fool has a disclosure policy.Source