Bayer AG (XTER:BAYN) Cyclically Adjusted Book per Share: €45.36 (As of Jun. 2026)

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XTER:BAYN Bayer AG XTER:BAYN
60 GF Score
Price €49.33
GF Value €27.49
Valuation Significantly Overvalued
! 5 Warning Signs
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What is Bayer AG Cyclically Adjusted Book per Share?

Bayer AG XTER:BAYN +2.41% 60 Cyclically Adjusted Book per Share is €45.36 as of Jun. 2026. GuruFocus rates XTER:BAYN with a GF Score™ of 60/100 and a GF Value™ of €27.49 (Significantly Overvalued). The stock has 5 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.

Bayer AG's adjusted book value per share for the three months ended in Jun. 2026 was €30.239. 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 €45.36 for the trailing ten years ended in Jun. 2026.

During the past 12 months, Bayer AG's average Cyclically Adjusted Book Growth Rate was 0.70% per year. During the past 3 years, the average Cyclically Adjusted Book Growth Rate was 3.20% per year. During the past 5 years, the average Cyclically Adjusted Book Growth Rate was 5.90% per year. During the past 10 years, the average Cyclically Adjusted Book Growth Rate was 6.90% 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 Bayer AG was 9.30% per year. The lowest was 0.80% per year. And the median was 6.80% per year.

As of today (2026-09-15), Bayer AG's current stock price is €49.33. Bayer AG's Cyclically Adjusted Book per Share for the quarter that ended in Jun. 2026 was €45.36. Bayer AG's Cyclically Adjusted PB Ratio of today is 1.09.

During the past 13 years, the highest Cyclically Adjusted PB Ratio of Bayer AG was 4.72. The lowest was 0.43. And the median was 1.47.


Bayer AG  (XTER:BAYN) 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.

Bayer AG's Cyclically Adjusted PB Ratio of today is calculated as

Cyclically Adjusted PB Ratio=Share Price/Cyclically Adjusted Book per Share
=49.33/45.355
=1.09

* 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 Bayer AG was 4.72. The lowest was 0.43. And the median was 1.47.


Be Aware

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


Bayer AG Cyclically Adjusted Book per Share Related Terms


Bayer AG Cyclically Adjusted Book per Share Historical Data

* Premium members only.

The historical data trend for Bayer AG'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.

Bayer AG Cyclically Adjusted Book per Share Chart

Bayer AG 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 37.04 41.32 43.13 44.46 44.00

Bayer AG 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 45.16 45.35 45.06 45.50 45.36

XTER:BAYN vs LLY, JNJ, ABBV: Cyclically Adjusted Book per Share Comparison

For the Drug Manufacturers - General subindustry, Bayer AG'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.


Bayer AG Cyclically Adjusted PB Ratio vs Drug Manufacturers Industry

For the Drug Manufacturers industry and Healthcare sector, Bayer AG's Cyclically Adjusted PB Ratio distribution charts can be found below:

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


XTER:BAYN
60GF Score
Bayer AG XTER:BAYN
Cyclically Adjusted Book per Share is just one metric. See GF Score™, valuation, warning signs, and more.
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Bayer AG 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, Bayer AG'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)
=30.239/131.3638*131.3638
=30.239

Current CPI (Jun. 2026) = 131.3638.

Bayer AG Quarterly Data

Book Value per Share CPI Adj_Book
201609 29.499 101.017 38.361
201612 37.958 101.217 49.264
201703 42.671 101.417 55.271
201706 42.226 102.117 54.320
201709 44.333 102.717 56.697
201712 43.866 102.617 56.154
201803 45.678 102.917 58.304
201806 50.630 104.017 63.941
201809 54.042 104.718 67.793
201812 49.486 104.217 62.376
201903 51.468 104.217 64.874
201906 48.108 105.718 59.779
201909 49.395 106.018 61.204
201912 48.282 105.818 59.938
202003 49.654 105.718 61.700
202006 36.508 106.618 44.982
202009 32.040 105.818 39.775
202012 31.224 105.518 38.872
202103 35.372 107.518 43.217
202106 31.102 108.486 37.661
202109 31.832 109.435 38.211
202112 33.761 110.384 40.178
202203 38.280 113.968 44.123
202206 38.887 115.760 44.129
202209 42.209 118.818 46.666
202212 39.622 119.345 43.612
202303 41.751 122.402 44.808
202306 37.788 123.140 40.312
202309 34.147 124.195 36.118
202312 33.670 123.773 35.735
202403 36.402 125.038 38.244
202406 36.488 125.882 38.077
202409 31.243 126.198 32.522
202412 32.618 127.041 33.728
202503 33.165 127.779 34.095
202506 31.046 128.412 31.760
202509 30.232 129.255 30.725
202512 26.529 129.361 26.940
202603 29.480 131.258 29.504
202606 30.239 131.364 30.239

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 €45.36 mean?
Bayer AG (XTER:BAYN) has a Cyclically Adjusted Book per Share of €45.36 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 Bayer AG and its competitors.
Is Bayer AG's Cyclically Adjusted Book per Share too high?
Bayer AG's current Cyclically Adjusted Book per Share is €45.36. Overall, Bayer AG has a GF Score™ of 60/100 and is considered Significantly Overvalued, reflecting its overall financial health beyond just this single metric.
How does Bayer AG's Cyclically Adjusted Book per Share compare to LLY and JNJ?
Bayer AG's Cyclically Adjusted Book per Share of €45.36 can be compared against companies in the Drug Manufacturers 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 a Drug Manufacturers company?
A good Cyclically Adjusted Book per Share depends on the Drug Manufacturers 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 Bayer AG and its competitors. Bayer AG's current Cyclically Adjusted Book per Share is €45.36. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is Bayer AG stock overvalued right now?
Based on GuruFocus' analysis, Bayer AG (XTER:BAYN) is currently considered Significantly Overvalued. The stock's GF Value™ is €27.49, compared to a current price of €49.33 — trading 79.4% above its estimated fair value. The current Cyclically Adjusted Book per Share is €45.36. Bayer AG's overall GF Score™ is 60/100 with 5 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 Bayer AG (XTER:BAYN), the current Cyclically Adjusted Book per Share is €45.36 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 Bayer AG (XTER:BAYN) Overvalued in 2026?

Based on GuruFocus' analysis, Bayer AG stock appears to be overvalued. The current stock price of €49.33 is trading 79.4% above its estimated GF Value™ of €27.49. GuruFocus considers Bayer AG to be Significantly Overvalued.

Key valuation signals for XTER:BAYN:

  • Cyclically Adjusted Book per Share: €45.36
  • GF Value™: €27.49 vs. price of €49.33 (79.4% above fair value)
  • GF Score™: 60/100 with 5 warning signs

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


Bayer AG Business Description

Address Kaiser-Wilhelm-Allee 1, Leverkusen, NW, DEU, 51368
Bayer is a German healthcare and agriculture conglomerate. Healthcare provides close to half of the company's sales and includes pharmaceutical drugs (about 38% of total sales in 2025) as well as vitamins and other consumer healthcare products (13% of total). The firm's crop science business (47% of total) sells seeds, pesticides, herbicides, and fungicides, which was expanded through its 2018 acquisition of Monsanto.
60GF Score

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

€49.33
Price
€27.49
GF Value