Hydrogen hopefuls, listen up! FuelCell Energy (NASDAQ:FCEL), the Connecticut-headquartered hydrogen-production company, is absurdly underappreciated on Wall Street. So, if you’re a believer in the snapback effect, now’s the time to buy FuelCell Energy stock.Undervalued businesses like FuelCell Energy can experience a “snapback effect” and become market darlings. And, you want to be in the trade before this happens, not after. So, let’s take stock of the bull case as FuelCell Energy is a clean-energy startup ...