FuelCell Energy (FCEL) shares rallied 7.5% in the last trading session to close at $8.64. This move can be attributable to notable volume with a higher number of shares being traded than in a typical session. This compares to the stock's 8.2% loss over the past four weeks.FuelCell Energy ended sharply higher on the last trading day, driven by investor enthusiasm around its newly announced strategic collaboration with Sustainable Development Capital LLP. The agreement to explore up to 450 megawatts of fuel-c ...