Plug Power investors must understand why Wall Street has been consistently wrong about the stock.The stock of hydrogen fuel developer Plug Power (PLUG 3.77%) has been a bumpy ride. But since the start of 2021, that ride has been consistently lower. Back then, the stock was valued as high as $70 per share. Today, the share price is below $3.Wall Street has been consistently wrong about where the stock price is headed next. In 2021, right before shares collapsed, nearly a dozen firms had a buy rating on the s ...