Fuelcell Energy Inc (FCEL) Historical Volatility

Tracking FCEL historical volatility helps you see how much Fuelcell Energy Inc's stock price has actually moved, giving you a baseline for whether option premiums look fair, cheap, or expensive. While implied volatility shows what the market expects, FCEL's HV, also known as realized volatility, shows what actually happened. Use our scanner to monitor FCEL 30 day historical volatility alongside longer lookback windows and spot the moments when realized and implied diverge.

Historical volatility is the annualized standard deviation of a stock's past returns, typically measured over rolling windows like 10, 20, 30, or 60 days. FCEL's 30 day historical volatility, or FCEL HV, is one of the most widely watched readings because it balances responsiveness with stability. Comparing FCEL's HV to its implied volatility reveals the volatility risk premium. When IV sits well above HV, options are pricing in more movement than the stock has actually delivered, giving option sellers an edge. When HV runs hot relative to IV, options are pricing in less movement than the stock has delivered, and buyers may be underpaying for it.

FuelCell Energy, Inc., together with its subsidiaries, designs, manufactures, sells, installs, operates, and services stationary fuel cell power plants for distributed baseload power generation. It offers SureSource1500, a 1.4-megawatt (MW) platform; SureSource 3000, a 2.8 MW platform; SureSource 4000, a 3.7 MW platform; SureSource 250, a 250- kilowatt (kW) platform; SureSource 400, a 400-kW platform; and SureSource Hydrogen, a 2.3 MW platform that is designed to produce up to 1,200 kilograms of hydrogen per day for multi-megawatt utility, microgrid, and distributed hydrogen applications, as well as on-site heat and chilling applications.