What happened Hydrogen fuel cell stock Plug Power (NASDAQ: PLUG) is down 7.8% as of 12:30 p.m. EDT Wednesday on no obvious news. In and of itself, though, that's not surprising. So what Plug stock hasn't been trading particularly rationally lately, falling on "good" news Monday, then rising on "bad" news yesterday. And yet, today's decline actually makes a bit more sense. Consider: In yesterday's note, analysts at investment bank Piper Sandler dinged Plug stock on worries that while hydrogen fuel might have some attraction as a "green" energy source, still has to compete with wind, solar, geothermal, and hydrogen power -- all more widely accepted sources of renewable energy, and industries with established momentum. While it's true, therefore, that Plug Power stock might benefit from the $2 trillion infrastructure plan currently working its way through Congress, it's also possible that this legislation will allocate the bulk of its "green money" to subsidizing solar, wind, and similar projects, rather than hydrogen fuel cells. Image source: Getty Images. Now what And that's what I think we're seeing today: Investors gauging the chances of the infrastructure bill being a big benefit to Plug or not -- and deciding today that "not" is the most likely answer. Going forward, I'd expect that Plug Power stock will remain volatile as the prospects for hydrogen fuel cells winning subsidy money in the infrastructure bill ebb and flow. My advice to investors would therefore be to ignore this noise and wait on the sidelines until the bill's language is finalized. Only then will we have actual facts to invest upon. 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 February 24, 2021 Rich 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