Better Hydrogen Stock: Plug Power vs. Nikola

Plug Power (PLUG -5.29%) and Nikola (NKLA -4.21%) represent two different ways to invest in the nascent hydrogen power market. Plug Power sells hydrogen fuel systems for electric forklifts and other warehouse equipment, while Nikola develops semitrailer trucks that run on electric batteries and hydrogen fuel cells. But today, Plug Power and Nikola only trade at about $2 and $10, respectively. Let's see why these hydrogen stocks ran out of fuel -- and which one could be the better turnaround play. | --- | -- ...