ERG SpA (FRA:ER9) Cyclically Adjusted PB Ratio: (As of Aug. 04, 2026)

Author: Vera Yuan Vera Yuan
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Director of Data and Quant Analytics at GuruFocus
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Charlie Tian
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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.

FRA:ER9 ERG SpA FRA:ER9
82 GF Score
Price €21.32
GF Value €23.37
Valuation Fairly Valued
! 3 Warning Signs
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What is ERG SpA Cyclically Adjusted PB Ratio?

Shiller PE for Stocks: The True Measure of Stock Valuation


ERG SpA  (FRA:ER9) Cyclically Adjusted PB Ratio Explanation

Compared with the regular PB Ratio, which works poorly for cyclical businesses, the Cyclically Adjusted PB Ratio smoothed out the fluctuations of book value during business cycles. Therefore it is more accurate in reflecting the valuation of the company.

If a company has consistent business performance, the Cyclically Adjusted PB Ratio should give similar results to regular PB Ratio.


ERG SpA Cyclically Adjusted PB Ratio Related Terms


ERG SpA Cyclically Adjusted PB Ratio Historical Data

* Premium members only.

The historical data trend for ERG SpA's Cyclically Adjusted PB 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.

ERG SpA Cyclically Adjusted PB Ratio Chart

ERG SpA Annual Data
Trend Dec16 Dec17 Dec18 Dec19 Dec20 Dec21 Dec22 Dec23 Dec24 Dec25
Cyclically Adjusted PB Ratio
Get a 7-Day Free Trial Premium Member Only Premium Member Only 2.27 2.08 2.07 1.39 1.55

ERG SpA Quarterly Data
Sep21 Dec21 Mar22 Jun22 Sep22 Dec22 Mar23 Jun23 Sep23 Dec23 Mar24 Jun24 Sep24 Dec24 Mar25 Jun25 Sep25 Dec25 Mar26 Jun26
Cyclically Adjusted PB Ratio Get a 7-Day Free Trial Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only 1.30 1.47 1.55 1.52 0.00

ERG SpA Cyclically Adjusted PB Ratio Competitor Comparison

For the Utilities - Renewable subindustry, ERG SpA's Cyclically Adjusted PB Ratio, along with its competitors' market caps and Cyclically Adjusted PB 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 Cyclically Adjusted PB Ratio vs Utilities - Independent Power Producers Industry

For the Utilities - Independent Power Producers industry and Utilities sector, ERG SpA's Cyclically Adjusted PB Ratio distribution charts can be found below:

* The bar in red indicates where ERG SpA's Cyclically Adjusted PB Ratio falls into.


FRA:ER9
82GF Score
ERG SpA FRA:ER9
Cyclically Adjusted PB Ratio is just one metric. See GF Score™, valuation, warning signs, and more.
View Full Analysis

ERG SpA Cyclically Adjusted PB Ratio Calculation

Like the Shiller PE Ratio, the Cyclically Adjusted PB Ratio takes the Book Value per Share from the past 10 years, adjusts it for inflation, and then calculates the average. This average is then used for the P/B calculation. Because it considers this 10-year average, it's often referred to as the CAPB Ratio.

The Shiller PE Ratio was first used by professor Robert Shiller to measure the valuation of the overall market. The similar calculation is applied by GuruFocus to calculate the Cyclically Adjusted PB Ratio.

ERG SpA's Cyclically Adjusted Book per Share for the quarter that ended in Jun. 2026 is calculated as:

For example, ERG SpA's adjusted Book Value per Share data for the three months ended in Jun. 2026 was:

Adj_Book=Book Value per Share/CPI of Jun. 2026 (Change)*Current CPI (Jun. 2026)
=12.999/126.4000*126.4000
=12.999

Current CPI (Jun. 2026) = 126.4000.

ERG SpA Quarterly Data

Book Value per Share CPI Adj_Book
201609 10.481 100.100 13.235
201612 11.619 100.300 14.642
201703 12.127 101.000 15.177
201706 11.777 101.100 14.724
201709 0.000 101.200 0.000
201712 12.616 101.200 15.758
201803 13.216 101.800 16.410
201806 12.148 102.400 14.995
201809 12.225 102.600 15.061
201812 12.289 102.300 15.184
201903 12.626 102.800 15.525
201906 11.574 103.100 14.190
201909 11.626 102.900 14.281
201912 11.921 102.800 14.658
202003 12.278 102.900 15.082
202006 11.558 102.900 14.198
202009 11.568 102.300 14.293
202012 11.809 102.600 14.548
202103 12.244 103.700 14.924
202106 11.393 104.200 13.820
202109 10.680 104.900 12.869
202112 10.472 106.600 12.417
202203 14.462 110.400 16.558
202206 12.930 112.500 14.528
202209 12.157 114.200 13.456
202212 13.678 119.000 14.529
202303 13.649 118.800 14.522
202306 13.832 119.700 14.606
202309 14.195 120.300 14.915
202312 14.474 119.700 15.284
202403 15.105 120.200 15.884
202406 14.354 120.700 15.032
202409 14.347 121.200 14.963
202412 14.707 121.200 15.338
202503 15.025 122.500 15.503
202506 13.921 122.700 14.341
202509 13.931 123.100 14.304
202512 13.623 122.600 14.045
202603 14.055 124.560 14.263
202606 12.999 126.400 12.999

Add all the adjusted book value per share together and divide the count will get our Cyclically Adjusted Book per Share.

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.

Is ERG SpA (FRA:ER9) Overvalued in 2026?

Based on GuruFocus' analysis, ERG SpA stock appears to be undervalued. The current stock price of €21.32 is trading 8.8% below its estimated GF Value™ of €23.37. GuruFocus considers ERG SpA to be Fairly Valued.

Key valuation signals for FRA:ER9:

  • Cyclically Adjusted PB Ratio:
  • GF Value™: €23.37 vs. price of €21.32 (8.8% below fair value)
  • GF Score™: 82/100 with 3 warning signs

No single metric tells the full story. See the FRA:ER9 stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.


ERG SpA Business Description

Other Exchanges ERG:ItalyERGm:UK0MHC:UK
Address Via De Marini, 1, Torre WTC, Genoa, ITA, 16149
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.
82GF Score

Get the complete analysis for FRA:ER9

Cyclically Adjusted PB Ratio is just one metric. See GF Value™, 30-year financials, guru trades, warning signs, and more.

€21.32
Price
€23.37
GF Value