Why Is Plug Power Stock Going Parabolic Today?

Plug Power (PLUG 1.82%) is on fire this morning, surging 15% as of 9:40 a.m. ET Thursday. The hydrogen stock has gained massive momentum recently and is now up a staggering 50% in just five days. A big analyst upgrade, the start of a key hydrogen plant, and Plug Power's CEO expressing confidence in turning the company's fortunes around -- investors have found a lot to like about the beaten-down stock.Plug Power's CEO expects things to improveA week after starting production at its new green hydrogen plant i ...