Naturgy Energy Group (STU:GAN) Cyclically Adjusted PB Ratio: (As of Sep. 15, 2026)

Author: Vera Yuan Vera Yuan
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STU:GAN Naturgy Energy Group SA STU:GAN
67 GF Score
Price €29.08
GF Value €20.49
Valuation Significantly Overvalued
! 7 Warning Signs
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What is Naturgy Energy Group Cyclically Adjusted PB Ratio?

Shiller PE for Stocks: The True Measure of Stock Valuation


Naturgy Energy Group  (STU:GAN) 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.


Naturgy Energy Group Cyclically Adjusted PB Ratio Related Terms


Naturgy Energy Group Cyclically Adjusted PB Ratio Historical Data

* Premium members only.

The historical data trend for Naturgy Energy Group'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.

Naturgy Energy Group Cyclically Adjusted PB Ratio Chart

Naturgy Energy Group 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 2.17 1.84 2.08 1.86 2.14

Naturgy Energy Group Quarterly Data
Dec16 Jun17 Dec17 Jun18 Dec18 Jun19 Dec19 Jun20 Dec20 Jun21 Dec21 Jun22 Dec22 Jun23 Dec23 Jun24 Dec24 Jun25 Dec25 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 0.00 1.86 0.00 2.14 0.00

STU:GAN vs ATO, NI, UGI: Cyclically Adjusted PB Ratio Comparison

For the Utilities - Regulated Gas subindustry, Naturgy Energy Group'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.


Naturgy Energy Group Cyclically Adjusted PB Ratio vs Utilities - Regulated Industry

For the Utilities - Regulated industry and Utilities sector, Naturgy Energy Group's Cyclically Adjusted PB Ratio distribution charts can be found below:

* The bar in red indicates where Naturgy Energy Group's Cyclically Adjusted PB Ratio falls into.


STU:GAN
67GF Score
Naturgy Energy Group SA STU:GAN
Cyclically Adjusted PB Ratio is just one metric. See GF Score™, valuation, warning signs, and more.
View Full Analysis

Naturgy Energy Group 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.

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

For example, Naturgy Energy Group'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)
=10.341/131.3300*131.3300
=10.341

Current CPI (Jun. 2026) = 131.3300.

Naturgy Energy Group Quarterly Data

Book Value per Share CPI Adj_Book
200412 10.208 82.101 16.329
200512 12.084 85.168 18.634
200612 12.622 87.438 18.958
200712 11.544 91.129 16.637
200812 12.126 92.434 17.229
200906 0.000 92.723 0.000
200912 11.588 93.169 16.334
201006 12.490 94.114 17.429
201012 12.350 95.953 16.903
201106 12.616 97.111 17.062
201112 12.899 98.235 17.245
201206 13.326 98.952 17.686
201212 13.252 101.052 17.223
201306 13.414 100.994 17.443
201312 13.435 101.306 17.417
201406 13.917 101.081 18.082
201412 14.131 100.251 18.512
201506 14.573 101.138 18.923
201512 14.357 100.268 18.805
201606 14.565 100.333 19.065
201612 15.226 101.842 19.635
201706 14.610 101.848 18.839
201712 14.724 102.975 18.778
201806 11.435 104.165 14.417
201812 11.096 104.193 13.986
201906 11.107 104.612 13.944
201912 10.874 105.015 13.599
202006 10.254 104.254 12.917
202012 8.354 104.456 10.503
202106 7.818 107.102 9.587
202112 6.129 111.298 7.232
202206 3.854 118.044 4.288
202212 7.882 117.650 8.798
202306 9.512 120.278 10.386
202312 9.834 121.300 10.647
202406 10.172 124.409 10.738
202412 9.865 124.753 10.385
202506 8.915 127.251 9.201
202512 10.084 128.400 10.314
202606 10.341 131.330 10.341

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 Naturgy Energy Group (STU:GAN) Overvalued in 2026?

Based on GuruFocus' analysis, Naturgy Energy Group stock appears to be overvalued. The current stock price of €29.08 is trading 41.9% above its estimated GF Value™ of €20.49. GuruFocus considers Naturgy Energy Group to be Significantly Overvalued.

Key valuation signals for STU:GAN:

  • Cyclically Adjusted PB Ratio:
  • GF Value™: €20.49 vs. price of €29.08 (41.9% above fair value)
  • GF Score™: 67/100 with 7 warning signs

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


Naturgy Energy Group Business Description

Address Avenida de America 38, Madrid, ESP
Naturgy stems from the 2008 acquisition of Union Fenosa. The company operates across the gas value chain, from procurement to distribution and marketing. It owns and operates the largest gas distribution network in Spain, where it is also the leading retail gas supplier. The company additionally operates gas and electricity distribution networks across several Latin American countries. It owns 17.9 GW of generation capacity, including 7.3 GW of wind and solar.
67GF Score

Get the complete analysis for STU:GAN

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

€29.08
Price
€20.49
GF Value