Isa Energia Brasil (BSP:ISAE4) Cyclically Adjusted Book per Share: R$23.41 (As of Mar. 2026)


BSP:ISAE4 Isa Energia Brasil SA BSP:ISAE4
76 GF Score
Price R$27.58
GF Value R$30.36
Valuation Fairly Valued
! 9 Warning Signs
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What is Isa Energia Brasil Cyclically Adjusted Book per Share?

Isa Energia Brasil BSP:ISAE4 -0.25% 76 Cyclically Adjusted Book per Share is R$23.41 as of Mar. 2026. GuruFocus rates BSP:ISAE4 with a GF Score™ of 76/100 and a GF Value™ of R$30.36 (Fairly Valued). The stock has 9 warning signs investors should review.

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. The similar calculation is applied by GuruFocus to calculate the Cyclically Adjusted Book per Share and the Cyclically Adjusted PB Ratio. The Cyclically Adjusted Book per Share is the average of the inflation adjusted Book Value per Share of a company over the past 10 years.

Isa Energia Brasil's adjusted book value per share for the three months ended in Mar. 2026 was R$32.519. Add all the adjusted book value per share for the past 10 years together and divide the count will get our Cyclically Adjusted Book per Share, which is R$23.41 for the trailing ten years ended in Mar. 2026.

During the past 12 months, Isa Energia Brasil's average Cyclically Adjusted Book Growth Rate was 11.60% per year. During the past 3 years, the average Cyclically Adjusted Book Growth Rate was 11.40% per year. During the past 5 years, the average Cyclically Adjusted Book Growth Rate was 12.10% per year. Please click Growth Rate Calculation Example (GuruFocus) to see how GuruFocus calculates Wal-Mart Stores Inc (WMT)'s revenue growth rate. You can apply the same method to get the Cyclically Adjusted Book Growth Rate using Cyclically Adjusted Book per Share data.

During the past 13 years, the highest 3-Year average Cyclically Adjusted Book Growth Rate of Isa Energia Brasil was 12.80% per year. The lowest was 11.30% per year. And the median was 11.60% per year.

As of today (2026-07-07), Isa Energia Brasil's current stock price is R$27.58. Isa Energia Brasil's Cyclically Adjusted Book per Share for the quarter that ended in Mar. 2026 was R$23.41. Isa Energia Brasil's Cyclically Adjusted PB Ratio of today is 1.18.

During the past 13 years, the highest Cyclically Adjusted PB Ratio of Isa Energia Brasil was 2.19. The lowest was 1.13. And the median was 1.60.


Isa Energia Brasil  (BSP:ISAE4) Cyclically Adjusted Book per Share Explanation

If a company grows much fast than inflation, Cyclically Adjusted Book per Share may underestimate the company's equity. Cyclically Adjusted PB Ratio can seem to be too high even the actual PB Ratio is low.

For the Cyclically Adjusted PB Ratio, the book value of the past 10 years are inflation-adjusted and averaged. The result is used for P/B calculation. Since it looks at the average over the last 10 years, the Cyclically Adjusted PB Ratio is also called CAPB Ratio.

The Shiller PE Ratio was first used by professor Robert Shiller. He uses E10 for his Shiller PE Ratio calculation. E10 is the average of the inflation adjusted earnings per share of a company over the past 10 years. The similar calculation is applied by GuruFocus to calculate the Cyclically Adjusted PB Ratio. The Cyclically Adjusted Book per Share is the average of the inflation adjusted book value per share of a company over the past 10 years.

Isa Energia Brasil's Cyclically Adjusted PB Ratio of today is calculated as

Cyclically Adjusted PB Ratio=Share Price/Cyclically Adjusted Book per Share
=27.58/23.41
=1.18

* 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.

During the past 13 years, the highest Cyclically Adjusted PB Ratio of Isa Energia Brasil was 2.19. The lowest was 1.13. And the median was 1.60.


Be Aware

Cyclically Adjusted PB Ratio works better for cyclical companies. It gives you a better idea on the company's real book value.


Isa Energia Brasil Cyclically Adjusted Book per Share Related Terms


Isa Energia Brasil Cyclically Adjusted Book per Share Historical Data

* Premium members only.

The historical data trend for Isa Energia Brasil's Cyclically Adjusted Book per Share 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.

Isa Energia Brasil Cyclically Adjusted Book per Share Chart

Isa Energia Brasil Annual Data
Trend Dec16 Dec17 Dec18 Dec19 Dec20 Dec21 Dec22 Dec23 Dec24 Dec25
Cyclically Adjusted Book per Share
Get a 7-Day Free Trial Premium Member Only Premium Member Only 13.76 15.33 15.98 18.03 21.62

Isa Energia Brasil Quarterly Data
Jun21 Sep21 Dec21 Mar22 Jun22 Sep22 Dec22 Mar23 Jun23 Sep23 Dec23 Mar24 Jun24 Sep24 Dec24 Mar25 Jun25 Sep25 Dec25 Mar26
Cyclically Adjusted Book per Share 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 17.58 19.48 20.53 21.62 23.41

BSP:ISAE4 vs CEG, VST, NRG: Cyclically Adjusted Book per Share Comparison

For the Utilities - Independent Power Producers subindustry, Isa Energia Brasil'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.


Isa Energia Brasil Cyclically Adjusted PB Ratio vs Utilities - Independent Power Producers Industry

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

* The bar in red indicates where Isa Energia Brasil's Cyclically Adjusted PB Ratio falls into.


BSP:ISAE4
76GF Score
Isa Energia Brasil SA BSP:ISAE4
Cyclically Adjusted Book per Share is just one metric. See GF Score™, valuation, warning signs, and more.
View Full Analysis

Isa Energia Brasil Cyclically Adjusted Book per Share Calculation

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. The similar calculation is applied by GuruFocus to calculate the Cyclically Adjusted Book per Share and the Cyclically Adjusted PB Ratio. The Cyclically Adjusted Book per Share is the average of the inflation adjusted Book Value per Share of a company over the past 10 years.

What is Cyclically Adjusted Book per Share? How do we calculate Cyclically Adjusted Book per Share?

Cyclically Adjusted Book per Share is the average of the inflation adjusted Book Value per Share of a company over the past 10 years. Let's use an example to explain.

If we want to calculate the Cyclically Adjusted Book per Share of Wal-Mart (WMT) for Dec. 31, 2010, we need to have the inflation data and the book value per share from 2001 through 2010.

We adjusted the 2001 book value per share data with the total inflation from 2001 through 2010 to the equivalent book value in 2010. If the total inflation from 2001 to 2010 is 40%, and Wal-Mart's book value is $1 a share in 2001, then the 2001's equivalent book value in 2010 is $1.4 a share. If Wal-Mart's book value is $1 again in 2002, and the total inflation from 2002 through 2010 is 35%, then the equivalent 2002 book value in 2010 is $1.35. So on and so forth, you get the equivalent book value per share of past 10 years. Then you add them together and divided the sum by the count to get 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.

For example, Isa Energia Brasil's adjusted Book Value per Share data for the three months ended in Mar. 2026 was:

Adj_Book= Book Value per Share /CPI of Mar. 2026 (Change)*Current CPI (Mar. 2026)
=32.519/175.0655*175.0655
=32.519

Current CPI (Mar. 2026) = 175.0655.

Isa Energia Brasil Quarterly Data

Book Value per Share CPI Adj_Book
201606 8.381 108.851 13.479
201609 15.259 109.986 24.288
201612 15.357 110.802 24.264
201703 15.754 111.869 24.654
201706 16.307 112.115 25.463
201709 16.990 112.777 26.374
201712 16.672 114.068 25.587
201803 17.031 114.868 25.956
201806 16.121 117.038 24.114
201809 17.171 117.881 25.501
201812 16.799 118.340 24.851
201903 17.336 120.124 25.265
201906 18.027 120.977 26.087
201909 18.136 121.292 26.176
201912 17.900 123.436 25.387
202003 18.546 124.092 26.164
202006 19.650 123.557 27.842
202009 20.233 125.095 28.315
202012 20.875 129.012 28.327
202103 20.197 131.660 26.855
202106 21.449 133.871 28.049
202109 22.072 137.913 28.018
202112 21.854 141.992 26.944
202203 22.609 146.537 27.011
202206 23.679 149.784 27.676
202209 24.395 147.800 28.895
202212 24.553 150.207 28.616
202303 25.680 153.352 29.316
202306 26.570 154.519 30.103
202309 27.284 155.464 30.724
202312 26.378 157.148 29.386
202403 27.344 159.372 30.037
202406 28.237 161.052 30.694
202409 29.937 162.342 32.283
202412 29.921 164.740 31.796
202503 30.984 168.102 32.268
202506 31.268 169.670 32.262
202509 31.731 170.739 32.535
202512 32.102 171.765 32.719
202603 32.519 175.066 32.519

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

What does a Cyclically Adjusted Book per Share of R$23.41 mean?
Isa Energia Brasil (BSP:ISAE4) has a Cyclically Adjusted Book per Share of R$23.41 as of Mar. 2026. Cyclically adjusted book value per share represents the company's inflation-adjusted book value per share over a 10-year period. View historical data on Isa Energia Brasil and its competitors.
Is Isa Energia Brasil's Cyclically Adjusted Book per Share too high?
Isa Energia Brasil's current Cyclically Adjusted Book per Share is R$23.41. Overall, Isa Energia Brasil has a GF Score™ of 76/100 and is considered Fairly Valued, reflecting its overall financial health beyond just this single metric.
How does Isa Energia Brasil's Cyclically Adjusted Book per Share compare to CEG and VST?
Isa Energia Brasil's Cyclically Adjusted Book per Share of R$23.41 can be compared against companies in the Utilities - Independent Power Producers industry. See the competitive comparison table and distribution chart on this page for a detailed peer-by-peer breakdown.
What is a good Cyclically Adjusted Book per Share for an Utilities - Independent Power Producers company?
A good Cyclically Adjusted Book per Share depends on the Utilities - Independent Power Producers industry context. However, Cyclically Adjusted Book per Share 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 Cyclically Adjusted Book per Share mean?
A high Cyclically Adjusted Book per Share can signal that a stock is expensive relative to its fundamentals. Cyclically adjusted book value per share represents the company's inflation-adjusted book value per share over a 10-year period. View historical data on Isa Energia Brasil and its competitors. Isa Energia Brasil's current Cyclically Adjusted Book per Share is R$23.41. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is Isa Energia Brasil stock overvalued right now?
Based on GuruFocus' analysis, Isa Energia Brasil (BSP:ISAE4) is currently considered Fairly Valued. The stock's GF Value™ is R$30.36, compared to a current price of R$27.58 — trading 9.2% below its estimated fair value. The current Cyclically Adjusted Book per Share is R$23.41. Isa Energia Brasil's overall GF Score™ is 76/100 with 9 warning signs to review. Investors should evaluate multiple metrics — including profitability, growth, and financial strength — before making a decision.
How is Cyclically Adjusted Book per Share calculated?
Cyclically Adjusted Book per Share is calculated from a company's financial statements. For Isa Energia Brasil (BSP:ISAE4), the current Cyclically Adjusted Book per Share is R$23.41 as of Mar. 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 Isa Energia Brasil (BSP:ISAE4) Overvalued in 2026?

Based on GuruFocus' analysis, Isa Energia Brasil stock appears to be undervalued. The current stock price of R$27.58 is trading 9.2% below its estimated GF Value™ of R$30.36. GuruFocus considers Isa Energia Brasil to be Fairly Valued.

Key valuation signals for BSP:ISAE4:

  • Cyclically Adjusted Book per Share: R$23.41
  • GF Value™: R$30.36 vs. price of R$27.58 (9.2% below fair value)
  • GF Score™: 76/100 with 9 warning signs

No single metric tells the full story. See the BSP:ISAE4 stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.


Isa Energia Brasil Business Description

Other Exchanges ISAE3:Brazil
Address Av. das Nacoes Unidas, No. 14.171-Torre Crystal-6 andar, Sao Paulo, SP, BRA, 04794-000
Isa Energia Brasil SA Formerly Cia de Transmissao de Energia Eletrica Paulista, or CTEEP, is a Brazilian private-public utility concession company involved in the transmission of electric power. Through its subsidiaries, CTEEP plans, constructs, operates, and maintains electric transmission systems and transmission-related infrastructure projects throughout the country of Brazil. The company segments its operations in one business segment: which is electric power transmission.
76GF Score

Get the complete analysis for BSP:ISAE4

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

R$27.58
Price
R$30.36
GF Value