Plug Power (PLUG) shares have kicked off 2021 with a bang, rising nearly 90% since the turn of the year. The PLUG narrative is benefiting from favorable macro conditions; A new U.S. administration intent on forwarding the case for clean energy is acting as a strong catalyst, driving positive investor sentiment toward the stock. Adding to the good news, the company said it has exceeded its 2020 gross billings target, while it expects to beat its previous 2021 estimates. The company previously guided for $450 million in billings in 2021, but now anticipates $475 million, a 5.5% increase. Further ahead, by 2024, PLUG is targeting $1.