Shares of Plug Power (PLUG) fell as much as 17% in extended hours after the company filed for a potential $1 billion share offering. The company is down over 88% over the last two years. Yahoo Finance Anchors Josh Lipton and Madison Mills break down the latest development for the company and what it could mean going forward. For more expert insight and the latest market action, click here to watch this full episode of Yahoo Finance Live. Editor's note: This article was written by Nicholas Jacobino