FuelCell Energy is trading at $13.38, down 5.00%, amid broader market weakness. - No confirmed new company-specific announcement explaining the October 16 decline was found; the CFO transition announced October 7 was prior context, not a newly reported catalyst. - The Nasdaq is down 1.30% and the S&P 500 is down 0.59%, amid technology selling and financing-cost concerns. This is the likeliest available context, though FuelCell Energy’s decline is larger. - Energy’s positive sector trend does not explain the decline.