American Water Works Co Inc
American Water Works Co Inc (AWK) Historical Volatility
AWK's 30 day historical volatility is 24.97%, in the 70th percentile of readings over the past year. This is an average percentile, meaning American Water Works Co Inc shares have moved roughly in line with their typical range. AWK's 30 day implied volatility sits at 25.73%, with an IV Rank of 75.79%, leaving IV roughly in line with historical volatility. This means options are priced close to what the stock has actually delivered, as of Nov 5, 2026.
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Tracking AWK historical volatility helps you see how much American Water Works Co 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, AWK's HV, also known as realized volatility, shows what actually happened. Use our scanner to monitor AWK 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. AWK's 30 day historical volatility, or AWK HV, is one of the most widely watched readings because it balances responsiveness with stability. Comparing AWK'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.
American Water Works Company, Inc., through its subsidiaries, provides water and wastewater services in the United States. It offers water and wastewater services to approximately 1,700 communities in 14 states serving approximately 3.4 million active customers. The company serves residential customers; commercial customers, including food and beverage providers, commercial property developers and proprietors, and energy suppliers; fire service and private fire customers; industrial customers, such as large-scale manufacturers, mining, and production operations; public authorities comprising government buildings and other public sector facilities, such as schools and universities; and other utilities and community water and wastewater systems.
Historical Volatility
Historical movement is near its typical level for the past year. Neither unusually calm nor unusually active.
As of Nov 5, 2026
As of Nov 5, 2026
As of Nov 5, 2026
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