Why Plug Power, Ballard Power Systems, and Bloom Energy Stocks Tanked Tuesday

Among fuel cell companies, Plug Power (NASDAQ: PLUG), Ballard Power Systems (NASDAQ: BLDP), and Bloom Energy (NYSE: BE) are down 64%, 55%, and 45%, respectively, over the past three months. After Ballard reported quarterly financial results last night, shares of the companies continue to fall today. Bloom Energy dropped 8.6%.