How Much Could You Lose In Plug Power Stock?

Shares of Plug Power (PLUG) dropped 20% over the past month. The company reported no financial results during that time, and the broader market actually gained ground, with the S&P 500 rising 1.8%. For anyone holding the shares, that disconnect raises an obvious concern regarding what happens when the whole market turns down. Since 2007, the company has traded through 15 market shocks. So how much has Plug Power lost when the market itself fell.