What happened Shares of hydrogen fuel cell stocks are rising today. As of 11 a.m. EST, shares of Plug Power (NASDAQ: PLUG) were up 13%, while Bloom Energy (NYSE: BE) and FuelCell Energy (NASDAQ: FCEL) both jumped 9%. Shares in the renewable energy companies are getting a boost with news from Plug Power and Walmart (NYSE: WMT). So what Plug Power announced this morning that it is expanding its partnership with Walmart. Plug Power has been providing Walmart with its hydrogen engines and fueling since 2010. Walmart uses about 9,500 Plug Power fuel cell vehicles for material handling at 37 of its North American distribution centers. Image source: Getty Images. Now the companies say that Plug Power will be expanding its hydrogen and fuel cell solutions to Walmart's e-commerce network into 2021. Now what The expansion of Plug Power's relationship with Walmart is somewhat of an affirmation of the fuel cell technology, which explains the jump in price for the related company stocks. But while the news is certainly good for Plug Power, it doesn't necessarily mean the value of Bloom Energy and FuelCell Energy should grow today. In fact, both have recently had news drive their shares down. Bloom Energy was recently the target of a critical article in The Wall Street Journal. And earlier this month, FuelCell Energy raised new capital, which diluted existing shareholders. Investors sold on that news, driving shares down almost 30%. These stocks tend to move together, and each has recovered since early December. All three are up between 10% and 20% since Dec. 2 when FuelCell announced its share sale. Today's moves are similar in that there is really no news on FuelCell or Bloom Energy specifically. But a growing relationship with the world's largest retailer certainly does benefit Plug Power. 10 stocks we like better than Plug PowerWhen investing geniuses David and Tom Gardner have a stock 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 Plug Power 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 November 20, 2020 Howard 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