What happened After gaining ground on both Monday and Tuesday, Bloom Energy (NYSE: BE) stock continued to rise Wednesday. The fuel cell specialist appeared to be benefiting from the market's reaction to news from one of its peers -- Plug Power (NASDAQ: PLUG). As of 1:11 p.m. EDT, shares of Bloom Energy were up by 4.8%. Image source: Getty Images. So what Investors familiar with the fuel cell industry know that one company's good news oftentimes provides some lift for related stocks. That appears to be exactly what's happening Wednesday. Bloom Energy hasn't issued any news releases of its own, and instead seems to be rising in response to Plug Power's newly announced collaborations with Phillips 66 and Airbus. Seeing Plug Power making inroads with industry leaders like Phillips 66 and Airbus, investors are likely feeling a renewed sense of optimism that the future of the hydrogen economy will live up to the hype. In addition, investors may be speculating that Bloom Energy could expand into the mobility sector as Plug Power is doing -- especially after Bloom Energy's late-July announcement that it was exploring opportunities in the marine industry. Now what Although some investors may be interpreting Plug Power's news as an encouraging sign for the broader hydrogen economy, those who are considering opening positions in the space should recognize that fuel cell investments are still extremely speculative. Neither Bloom Energy nor Plug Power has proven yet that the fuel cell industry can be profitable. Consequently, investors with an interest in this niche of the renewable energy sector should only consider picking up shares of Bloom Energy -- or Plug Power for that matter -- if they have an ample tolerance for risk. 10 stocks we like better than Bloom Energy CorpWhen our award-winning analyst team has 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.* They just revealed what they believe are the ten best stocks for investors to buy right now... and Bloom Energy Corp 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 September 17, 2021 Scott Levine 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