Focused on building reliable datasets, financial models, and research tools for value-minded investors. Committed to turning complex data into practical guidance for value-investing and long-term wealth.
Dr. Charlie Tian is the founder and CEO of GuruFocus.com, a leading global investment research platform established in 2004. With a Ph.D. in physics, Dr. Tian transitioned from science to finance, applying a data-driven, disciplined approach to value investing.
ERG SpAMIL:ERG +1.36%73 Shiller PE Ratio is 15.47 as of Sep. 05, 2026, which is 38% below its 10-year median of 24.88. GuruFocus rates MIL:ERG with a GF Score™ of 73/100 and a GF Value™ of €23.94 (Fairly Valued). The stock has 5 warning signs investors should review. Among 203 Utilities - Independent Power Producers companies, ERG SpA ranks worse than 51.72% on this metric.
As of today (2026-09-05), ERG SpA's current share price is €22.28. ERG SpA's E10 for the quarter that ended in Jun. 2026 was €1.44. ERG SpA's Shiller PE Ratio for today is 15.47.
The historical rank and industry rank for ERG SpA's Shiller PE Ratio or its related term are showing as below:
MIL:ERG'
s Shiller PE Ratio Range Over the Past 10 Years
Min: 11.92 Med: 24.88 Max: 44.6
Current: 15.49
During the past years, ERG SpA's highest Shiller PE Ratio was 44.60. The lowest was 11.92. And the median was 24.88.
E10 is a concept invented by Prof. Robert Shiller, who uses E10 for his Shiller PE Ratio calculation. E10 is the average of the inflation adjusted earnings of a company over the past 10 years.
ERG SpA's adjusted earnings per share data for the three months ended in Jun. 2026 was €0.021. Add all the adjusted EPS for the past 10 years together and divide 10 will get our E10, which is €1.44 for the trailing ten years ended in Jun. 2026.
Shiller PE for Stocks: The True Measure of Stock Valuation
Compared with the regular PE Ratio, which works poorly for cyclical businesses, the Shiller PE Ratio smoothed out the fluctuations of profit margins during business cycles. Therefore it is more accurate in reflecting the valuation of the company.
If a company has consistent business performance, the Shiller PE Ratio should give similar results to regular PE Ratio.
Compared with the PS Ratio, the Shiller PE Ratio makes the comparison between different industries more meaningful.
Be Aware
Shiller PE Ratio assumes that over the long term, businesses and profitability revert to their means. If a company's business model does not work in the future compared with the past, Shiller PE Ratio and PS Ratio will give false valuations.
ERG SpA Shiller PE Ratio Related Terms
ERG SpA Shiller PE Ratio Historical Data
* Premium members only.
The historical data trend for ERG SpA's Shiller PE Ratio can be seen below:
* 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.
For the Utilities - Renewable subindustry, ERG SpA's Shiller PE Ratio, along with its competitors' market caps and Shiller PE Ratio 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.
ERG SpA Shiller PE Ratio vs Utilities - Independent Power Producers Industry
For the Utilities - Independent Power Producers industry and Utilities sector, ERG SpA's Shiller PE Ratio distribution charts can be found below:
* The bar in red indicates where ERG SpA's Shiller PE Ratio falls into.
For Shiller PE Ratio, the earnings of the past 10 years are inflation-adjusted and averaged. The result is used for P/E calculation. Since it looks at the average over the last 10 years, the Shiller PE Ratio is also called PE10.
The Shiller PE Ratio was first used by professor Robert Shiller to measure the valuation of the overall market. The same calculation is applied here to individual companies.
ERG SpA's Shiller PE Ratio for today is calculated as
* 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.
ERG SpA's E10 for the quarter that ended in Jun. 2026 is calculated as:
For example, ERG SpA's adjusted earnings per share data for the three months ended in Jun. 2026 was:
Add all the adjusted EPS together and divide 10 will get our E10.
Please note that we use the CPI data of the country/region where the company is headquartered. If the CPI data for that country/region is not available, then we will use the CPI data of the United States as default.
ERG SpA (MIL:ERG) has a Shiller PE Ratio of 15.47 as of Sep. 05, 2026. Shiller price-earnings ratio is the ratio of share price to a company's inflation-adjusted earnings over a 10-year period. View historical data on ERG SpA and its competitors. This is 38% below median its historical median of 24.88. Over the past decade, ERG SpA's Shiller PE Ratio has ranged from 11.92 to 44.60. According to the industry distribution chart, ERG SpA ranks #105 out of 203 companies in the Utilities - Independent Power Producers industry, placing it in the top 51.7%.
Is ERG SpA's Shiller PE Ratio too high?
ERG SpA's current Shiller PE Ratio of 15.47 is 38% below median its 10-year median of 24.88. Over the past 10 years, this metric has ranged from a low of 11.92 to a high of 44.60. The Utilities - Independent Power Producers industry median Shiller PE Ratio is 15.20. ERG SpA's value of 15.47 is 1.8% above this industry median. Based on the distribution chart, ERG SpA ranks #105 out of 203 companies in the Utilities - Independent Power Producers industry, which is below the industry midpoint. Overall, ERG SpA has a GF Score™ of 73/100 and is considered Fairly Valued, reflecting its overall financial health beyond just this single metric.
How does ERG SpA's Shiller PE Ratio compare to competitors?
According to the Utilities - Independent Power Producers industry distribution chart, ERG SpA ranks #105 out of 203 companies for Shiller PE Ratio. This places ERG SpA in the lower half of its industry. The industry median Shiller PE Ratio is 15.20. ERG SpA's value of 15.47 is 1.8% above this benchmark. Historically, ERG SpA's own Shiller PE Ratio has ranged from 11.92 to 44.60 over the past decade. While the company's 10-year median is 24.88 vs. the industry median of 15.20, ERG SpA has consistently been above the industry average. See the competitive comparison table and distribution chart on this page for a detailed peer-by-peer breakdown.
What is a good Shiller PE Ratio for an Utilities - Independent Power Producers company?
The median Shiller PE Ratio among Utilities - Independent Power Producers companies is 15.20, based on 203 companies in the industry. Companies in the top quartile (top 25%) have a Shiller PE Ratio significantly above this median, while those in the bottom quartile fall well below. However, Shiller PE Ratio should not be evaluated in isolation — investors should consider it alongside profitability, growth, and financial strength metrics. ERG SpA's current Shiller PE Ratio of 15.47 is 1.8% above the industry median. Use the industry distribution chart on this page to see where any company falls relative to its peers.
What does a high Shiller PE Ratio mean?
A high Shiller PE Ratio can signal that a stock is expensive relative to its fundamentals. Shiller price-earnings ratio is the ratio of share price to a company's inflation-adjusted earnings over a 10-year period. View historical data on ERG SpA and its competitors. For the Utilities - Independent Power Producers industry, the median Shiller PE Ratio is 15.20 — values significantly above this may indicate overvaluation, while values below may suggest a bargain or underlying issues. ERG SpA's current Shiller PE Ratio is 15.47, which is 38% below median its own 10-year median of 24.88. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is ERG SpA stock overvalued right now?
Based on GuruFocus' analysis, ERG SpA (MIL:ERG) is currently considered Fairly Valued. The stock's GF Value™ is €23.94, compared to a current price of €22.28 — trading 6.9% below its estimated fair value. The current Shiller PE Ratio is 15.47, which is 38% below median its 10-year median of 24.88 and 1.8% above the Utilities - Independent Power Producers industry median of 15.20. ERG SpA's overall GF Score™ is 73/100 with 5 warning signs to review. Investors should evaluate multiple metrics — including profitability, growth, and financial strength — before making a decision.
How is Shiller PE Ratio calculated?
Shiller PE Ratio is calculated from a company's financial statements. For ERG SpA (MIL:ERG), the current Shiller PE Ratio is 15.47 as of Sep. 05, 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 ERG SpA (MIL:ERG) Overvalued in 2026?
Based on GuruFocus' analysis, ERG SpA stock appears to be undervalued.
The current stock price of €22.28 is trading 6.9% below its estimated GF Value™ of €23.94.
GuruFocus considers ERG SpA to be Fairly Valued.
Key valuation signals for MIL:ERG:
Shiller PE Ratio: 15.47 (38% below median its 10-year median of 24.88)
GF Value™: €23.94 vs. price of €22.28 (6.9% below fair value)
Industry Position: 1.8% above the Utilities - Independent Power Producers median (#105 of 203)
No single metric tells the full story. See the MIL:ERG stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.
ERG SpA produces electricity from clean, renewable, and sustainable sources. Its energy comes from the combination of natural resources such as wind and sun. The company produces wind power, and electricity as a hydroelectric operator to markets across Europe. Electricity is also generated from natural gas operations located in Italy. ERG's wind power production is handled by subsidiary ENG Renew which focuses on developing, building, and operating wind assets. Hydropower and natural gas operations are split off into ERG Power Generation. The company's hydro assets include plants, dams, reservoirs, and a pumping station. Electricity from the plant is either fed into Italy's national grid or used to power other industrial plants.
73GF Score
Get the complete analysis for MIL:ERG
Shiller PE Ratio is just one metric. See GF Value™, 30-year financials, guru trades, warning signs, and more.
Quick Browse
Personalize
Premium Gurus 
Create New Portfolio
MIL:ERG has been successfully added to your 
