Volatility is a statistical measure of the dispersion of returns for a given security or market index, it shows how the price swings around its mean. The volatility here is measured as the annualized standard deviation between monthly returns from the security over the past year. In most cases, the higher the volatility, the riskier the security.
Athens Water Supply & Sewerage Co (ATH:EYDAP) Volatility Explanation
Volatility is a statistical measure of the dispersion of returns for a given security or market index. It’s often measured as standard deviation or variance of historical returns over a certain period. The volatility here is measured as the annualized standard deviation between monthly returns from the security over the past year.
Volatility reflects the uncertainty or risk of a security’s value. Generally speaking, a higher volatility suggests a higher risk, because it implies a wider fluctuation around average price. This means the price of the security can change dramatically in either direction within a short period. Conversely, a lower volatility means that the security's price is more steady, which suggests a lower risk.
Another measurement of relative volatility is Beta. Beta is a measure of systematic risk of a security or a portfolio in comparison to the market as a whole. Beta is usually compared to 1. A beta of greater than 1 indicates that the security's price will be more volatile than the market.
Athens Water Supply & Sewerage Co Volatility Related Terms
ATH:EYDAP vs AWK, WTRG, AWR: Volatility Comparison
For the Utilities - Regulated Water subindustry, Athens Water Supply & Sewerage Co's Volatility, along with its competitors' market caps and Volatility data, can be viewed below:
* Competitive companies are chosen from companies within the same industry, with headquarter located in same country, with closest market capitalization; x-axis shows the market cap, and y-axis shows the term value; the bigger the dot, the larger the market cap. Note that "N/A" values will not show up in the chart.
Athens Water Supply & Sewerage Co Volatility vs Utilities - Regulated Industry
For the Utilities - Regulated industry and Utilities sector, Athens Water Supply & Sewerage Co's Volatility distribution charts can be found below:
* The bar in red indicates where Athens Water Supply & Sewerage Co's Volatility falls into.
Athens Water Supply & Sewerage Co (ATH:EYDAP) Volatility Calculation
The annualized volatility is calculated as following:
σA
=
σM
*
√12
=
√ 1/(n-1) ∑(Ri - R')^2
*
√12
Where: σM is the monthly volatility, n is the number of months in the period, Ri is the security's historical monthly returns and R' is the arithmetic mean of monthly returns.
* For Operating Data section: All numbers are indicated by the unit behind each term and all currency related amount are in USD. * For other sections: All numbers are in millions except for per share data, ratio, and percentage. All currency related amount are indicated in the company's associated stock exchange currency.
Athens Water Supply & Sewerage Co (ATH:EYDAP) has a Volatility of 36.33% as of Jun. 25, 2026. Volatility is measured as the annualized standard deviation between monthly returns from the security over the past year. View historical data on Athens Water Supply & Sewerage Co and its competitors.
Is Athens Water Supply & Sewerage Co's Volatility too high?
Athens Water Supply & Sewerage Co's current Volatility is 36.33%. Overall, Athens Water Supply & Sewerage Co has a GF Score™ of 70/100 and is considered Significantly Overvalued, reflecting its overall financial health beyond just this single metric.
How does Athens Water Supply & Sewerage Co's Volatility compare to AWK and WTRG?
Athens Water Supply & Sewerage Co's Volatility of 36.33% can be compared against companies in the Utilities - Regulated industry. See the competitive comparison table and distribution chart on this page for a detailed peer-by-peer breakdown.
What is a good Volatility for an Utilities - Regulated company?
A good Volatility depends on the Utilities - Regulated industry context. However, Volatility should not be evaluated in isolation — investors should consider it alongside profitability, growth, and financial strength metrics. Use the industry distribution chart on this page to see where any company falls relative to its peers.
What does a high Volatility mean?
A high Volatility can signal that a stock is expensive relative to its fundamentals. Volatility is measured as the annualized standard deviation between monthly returns from the security over the past year. View historical data on Athens Water Supply & Sewerage Co and its competitors. Athens Water Supply & Sewerage Co's current Volatility is 36.33%. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is Athens Water Supply & Sewerage Co stock overvalued right now?
Based on GuruFocus' analysis, Athens Water Supply & Sewerage Co (ATH:EYDAP) is currently considered Significantly Overvalued. The stock's GF Value™ is €6.80, compared to a current price of €10.58 — trading 55.6% above its estimated fair value. The current Volatility is 36.33%. Athens Water Supply & Sewerage Co's overall GF Score™ is 70/100 with 9 warning signs to review. Investors should evaluate multiple metrics — including profitability, growth, and financial strength — before making a decision.
How is Volatility calculated?
Volatility is calculated from a company's financial statements. For Athens Water Supply & Sewerage Co (ATH:EYDAP), the current Volatility is 36.33% as of Jun. 25, 2026. GuruFocus calculates this using data sourced from SEC filings and annual reports. See the calculation section and 30-year financial data on this page for the full breakdown.
Is Athens Water Supply & Sewerage Co (ATH:EYDAP) Overvalued in 2026?
Based on GuruFocus' analysis, Athens Water Supply & Sewerage Co stock appears to be overvalued.
The current stock price of €10.58 is trading 55.6% above its estimated GF Value™ of €6.80.
GuruFocus considers Athens Water Supply & Sewerage Co to be Significantly Overvalued.
Key valuation signals for ATH:EYDAP:
Volatility: 36.33%
GF Value™: €6.80 vs. price of €10.58 (55.6% above fair value)
No single metric tells the full story. See the ATH:EYDAP stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.
Athens Water Supply & Sewerage Co Business Description
Athens Water Supply & Sewerage Co is a Greek water supply, refinement, and waste management company. The company operates primarily in various municipalities in the Attica region of Southern Greece. Key segments include water supply, sewerage, and wastewater treatment, and energy. The energy segment is involved in power generation through hydropower, natural gas, and solar energy. The company derives the majority of its revenue from commercial and residential consumers. The company also sells to industrial and local authorities.
70GF Score
Get the complete analysis for ATH:EYDAP
Volatility is just one metric. See GF Value™, 30-year financials, guru trades, warning signs, and more.
Quick Browse
Personalize
Premium Gurus 
Create New Portfolio
ATH:EYDAP has been successfully added to your 