Thursday was a good day for the Nasdaq, which closed the day up 1.8%. But Thursday was not a good day for investors in one of the best-known alternative energy plays on the Nasdaq: Hydrogen fuel cell company Plug Power (NASDAQ:PLUG), which closed the day down nearly 6%. What went wrong with Plug stock? To find out, we need to travel back in time, to when Plug Power gave investors its 2023 January Business Update Wednesday evening. Much of what Plug told investors came as no surprise. As before,