Ameren (BSP:A1EE34) Cyclically Adjusted Book per Share: R$105.03 (As of Jun. 2026)

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

BSP:A1EE34 Ameren Corp BSP:A1EE34
74 GF Score
Price R$269.09
GF Value R$260.88
! 9 Warning Signs
View Full Analysis

What is Ameren Cyclically Adjusted Book per Share?

Ameren BSP:A1EE34 74 Cyclically Adjusted Book per Share is R$105.03 as of Jun. 2026. GuruFocus rates BSP:A1EE34 with a GF Score™ of 74/100 and a GF Value™ of R$260.88. 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.

Ameren's adjusted book value per share for the three months ended in Jun. 2026 was R$126.686. 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$105.03 for the trailing ten years ended in Jun. 2026.

During the past 12 months, Ameren's average Cyclically Adjusted Book Growth Rate was 5.80% per year. During the past 3 years, the average Cyclically Adjusted Book Growth Rate was 4.90% per year. During the past 5 years, the average Cyclically Adjusted Book Growth Rate was 5.50% per year. During the past 10 years, the average Cyclically Adjusted Book Growth Rate was 2.70% 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 Ameren was 6.00% per year. The lowest was -1.50% per year. And the median was 2.10% per year.

As of today (2026-09-07), Ameren's current stock price is R$269.09. Ameren's Cyclically Adjusted Book per Share for the quarter that ended in Jun. 2026 was R$105.03. Ameren's Cyclically Adjusted PB Ratio of today is 2.56.

During the past 13 years, the highest Cyclically Adjusted PB Ratio of Ameren was 2.73. The lowest was 1.44. And the median was 2.30.


Ameren  (BSP:A1EE34) 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.

Ameren's Cyclically Adjusted PB Ratio of today is calculated as

Cyclically Adjusted PB Ratio=Share Price/Cyclically Adjusted Book per Share
=269.09/105.03
=2.56

* 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 Ameren was 2.73. The lowest was 1.44. And the median was 2.30.


Be Aware

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


Ameren Cyclically Adjusted Book per Share Related Terms


Ameren Cyclically Adjusted Book per Share Historical Data

* Premium members only.

The historical data trend for Ameren'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.

Ameren Cyclically Adjusted Book per Share Chart

Ameren 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 88.86 95.70 93.28 123.07 113.85

Ameren Quarterly Data
Sep21 Dec21 Mar22 Jun22 Sep22 Dec22 Mar23 Jun23 Sep23 Dec23 Mar24 Jun24 Sep24 Dec24 Mar25 Jun25 Sep25 Dec25 Mar26 Jun26
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 117.88 108.96 113.85 109.76 105.03

BSP:A1EE34 vs DTE, EIX, ES: Cyclically Adjusted Book per Share Comparison

For the Utilities - Regulated Electric subindustry, Ameren'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.


Ameren Cyclically Adjusted PB Ratio vs Utilities - Regulated Industry

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

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


BSP:A1EE34
74GF Score
Ameren Corp BSP:A1EE34
Cyclically Adjusted Book per Share is just one metric. See GF Score™, valuation, warning signs, and more.
View Full Analysis

Ameren 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, Ameren'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)
=126.686/333.9520*333.9520
=126.686

Current CPI (Jun. 2026) = 333.9520.

Ameren Quarterly Data

Book Value per Share CPI Adj_Book
201609 48.228 241.428 66.711
201612 49.100 241.432 67.916
201703 45.533 243.801 62.370
201706 48.616 244.955 66.279
201709 47.420 246.819 64.160
201712 48.787 246.524 66.089
201803 48.660 249.554 65.117
201806 57.075 251.989 75.639
201809 64.407 252.439 85.204
201812 60.602 251.233 80.555
201903 60.246 254.202 79.147
201906 61.106 256.143 79.668
201909 67.557 256.759 87.868
201912 67.177 256.974 87.300
202003 80.002 258.115 103.507
202006 86.372 257.797 111.887
202009 92.720 260.280 118.964
202012 90.769 260.474 116.374
202103 100.880 264.877 127.188
202106 91.465 271.696 112.423
202109 99.237 274.310 120.814
202112 106.427 278.802 127.479
202203 94.498 287.504 109.765
202206 96.500 296.311 108.759
202209 103.462 296.808 116.410
202212 105.188 296.797 118.356
202303 105.193 301.836 116.386
202306 98.820 305.109 108.162
202309 103.723 307.789 112.540
202312 104.408 306.746 113.668
202403 106.871 312.332 114.269
202406 116.473 314.175 123.805
202409 122.759 315.301 130.021
202412 136.916 315.605 144.875
202503 130.148 319.799 135.908
202506 126.278 322.561 130.737
202509 126.690 324.800 130.260
202512 132.257 324.054 136.297
202603 128.125 330.213 129.576
202606 126.686 333.952 126.686

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$105.03 mean?
Ameren (BSP:A1EE34) has a Cyclically Adjusted Book per Share of R$105.03 as of Jun. 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 Ameren and its competitors.
Is Ameren's Cyclically Adjusted Book per Share too high?
Ameren's current Cyclically Adjusted Book per Share is R$105.03. Overall, Ameren has a GF Score™ of 74/100, reflecting its overall financial health beyond just this single metric.
How does Ameren's Cyclically Adjusted Book per Share compare to DTE and EIX?
Ameren's Cyclically Adjusted Book per Share of R$105.03 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 Cyclically Adjusted Book per Share for an Utilities - Regulated company?
A good Cyclically Adjusted Book per Share depends on the Utilities - Regulated 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 Ameren and its competitors. Ameren's current Cyclically Adjusted Book per Share is R$105.03. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is Ameren stock overvalued right now?
Ameren (BSP:A1EE34) has a current Cyclically Adjusted Book per Share of R$105.03. The stock's GF Value™ is R$260.88, compared to a current price of R$269.09 — trading 3.1% above its estimated fair value. The current Cyclically Adjusted Book per Share is R$105.03. Ameren's overall GF Score™ is 74/100 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 Ameren (BSP:A1EE34), the current Cyclically Adjusted Book per Share is R$105.03 as of Jun. 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 Ameren (BSP:A1EE34) Overvalued in 2026?

Based on GuruFocus' analysis, Ameren stock appears to be overvalued. The current stock price of R$269.09 is trading 3.1% above its estimated GF Value™ of R$260.88.

Key valuation signals for BSP:A1EE34:

  • Cyclically Adjusted Book per Share: R$105.03
  • GF Value™: R$260.88 vs. price of R$269.09 (3.1% above fair value)
  • GF Score™: 74/100 with 9 warning signs

No single metric tells the full story. See the BSP:A1EE34 stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.


Ameren Business Description

Address 1901 Chouteau Avenue, St. Louis, MO, USA, 63103
Ameren owns rate-regulated generation, transmission, and distribution networks that deliver electricity and natural gas through the company's two main subsidiaries, Ameren Missouri and Ameren Illinois. It serves 2.5 million electricity customers and 900,000 natural gas customers across its two service territories.
74GF Score

Get the complete analysis for BSP:A1EE34

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

R$269.09
Price
R$260.88
GF Value