Nikola (NKLA 11.74%) announced some news that has its stock popping today. As of 12:40 p.m. ET, the stock of the electric heavy truck maker was near the day's highs, up by 13.1%.While that's good news for shareholders, the stock is still sitting below $1 per share after dropping more than 40% over the last three months. But today's news is what might help this company rebound.Hydrogen truck sales are happeningEven after that huge drop, Nikola has a market cap of more than $860 million. While that may sound ...