Fortis Inc
Fortis Inc (FTS) Historical Volatility
FTS 30-day historical volatility is 12%. This ranks in the 27th percentile of readings over the past year.
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Tracking FTS historical volatility helps you see how much Fortis Inc's stock price has actually moved over past periods, giving you a baseline to judge whether current option premiums are fair, cheap, or expensive. While implied volatility tells you what the market expects, Fortis Inc's HV tells you what really happened. Use our scanner to monitor FTS 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 an underlying's past returns, typically measured over rolling windows like 10, 20, 30, or 60 days. The FTS 30 day historical volatility is one of the most widely watched readings because it balances responsiveness with stability. Comparing Fortis Inc's HV to its implied volatility reveals the volatility risk premium — when IV sits well above HV, option sellers tend to have an edge; when HV runs hot relative to IV, buyers may be underpaying for movement.
Fortis Inc. operates as an electric and gas utility company in Canada, the United States, and the Caribbean countries. It generates, transmits, and distributes electricity to approximately 438,000 retail customers in southeastern Arizona; and 100,000 retail customers in Arizona's Mohave and Santa Cruz counties with an aggregate capacity of 3,485 megawatts (MW), including 53 MW of solar capacity and 252 MV of wind capacity. The company also sells wholesale electricity to other entities in the western United States; owns gas-fired and hydroelectric generating capacity totaling 65 MW; and distributes natural gas to approximately 1,065,000 residential, commercial, and industrial customers in British Columbia, Canada.
In addition, it owns and operates the electricity distribution system that serves approximately 577,000 customers in southern and central Alberta; owns 4 hydroelectric generating facilities with a combined capacity of 225 MW; and provides operation, maintenance, and management services to five hydroelectric generating facilities. Further, the company distributes electricity in the island portion of Newfoundland and Labrador with an installed generating capacity of 143 MW; and on Prince Edward Island with a generating capacity of 130 MW. Additionally, it provides integrated electric utility service to approximately 68,000 customers in Ontario; approximately 272,000 customers in Newfoundland and Labrador; approximately 32,000 customers on Grand Cayman, Cayman Islands; and approximately 16,000 customers on certain islands in Turks and Caicos. The company also holds long-term contracted generation assets in Belize consisting of 3 hydroelectric generating facilities with a combined capacity of 51 MW; and the Aitken Creek natural gas storage facility. It also owns and operates approximately 90,200 circuit Kilometers (km) of distribution lines; and approximately 50,500 km of natural gas pipelines. Fortis Inc. was founded in 1885 and is headquartered in St. John's, Canada.
Sizing a long premium trade, modeling a covered call, or hunting volatility arbitrage all come back to one question: how much has the stock actually moved? Our scanner puts Fortis Inc's historical volatility side-by-side with implied readings across every lookback window, so you can see exactly where FTS HV is running hot, cold, or in line. Make the FTS 30 day historical volatility — and every other window — work for your edge instead of against it.
As of September 28, 2026
As of September 28, 2026
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