Cosan (FRA:9CI0) Cyclically Adjusted Book per Share: €5.37 (As of Mar. 2026)

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FRA:9CI0 Cosan SA FRA:9CI0
74 GF Score
Price €2.66
GF Value €4.83
Valuation Possible Value Trap
! 3 Warning Signs
View Full Analysis

What is Cosan Cyclically Adjusted Book per Share?

Cosan FRA:9CI0 74 Cyclically Adjusted Book per Share is €5.37 as of Mar. 2026. GuruFocus rates FRA:9CI0 with a GF Score™ of 74/100 and a GF Value™ of €4.83 (Possible Value Trap). The stock has 3 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.

Cosan's adjusted book value per share for the three months ended in Mar. 2026 was €0.590. 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 €5.37 for the trailing ten years ended in Mar. 2026.

During the past 12 months, Cosan's average Cyclically Adjusted Book Growth Rate was -3.40% per year. During the past 3 years, the average Cyclically Adjusted Book Growth Rate was 1.80% per year. During the past 5 years, the average Cyclically Adjusted Book Growth Rate was 3.50% 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 Cosan was 5.10% per year. The lowest was 1.80% per year. And the median was 5.05% per year.

As of today (2026-07-16), Cosan's current stock price is €2.66. Cosan's Cyclically Adjusted Book per Share for the quarter that ended in Mar. 2026 was €5.37. Cosan's Cyclically Adjusted PB Ratio of today is 0.50.

During the past 13 years, the highest Cyclically Adjusted PB Ratio of Cosan was 3.58. The lowest was 0.39. And the median was 1.87.


Cosan  (FRA:9CI0) 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.

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

Cyclically Adjusted PB Ratio=Share Price/Cyclically Adjusted Book per Share
=2.66/5.37
=0.50

* 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 Cosan was 3.58. The lowest was 0.39. And the median was 1.87.


Be Aware

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


Cosan Cyclically Adjusted Book per Share Related Terms


Cosan Cyclically Adjusted Book per Share Historical Data

* Premium members only.

The historical data trend for Cosan'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.

Cosan Cyclically Adjusted Book per Share Chart

Cosan 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 4.78 5.76 6.29 5.61 5.38

Cosan 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 5.96 5.42 5.63 5.38 5.37

FRA:9CI0 vs VLO, MPC, PSX: Cyclically Adjusted Book per Share Comparison

For the Oil & Gas Refining & Marketing subindustry, Cosan'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.


Cosan Cyclically Adjusted PB Ratio vs Oil & Gas Industry

For the Oil & Gas industry and Energy sector, Cosan's Cyclically Adjusted PB Ratio distribution charts can be found below:

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


FRA:9CI0
74GF Score
Cosan SA FRA:9CI0
Cyclically Adjusted Book per Share is just one metric. See GF Score™, valuation, warning signs, and more.
View Full Analysis

Cosan 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, Cosan'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)
=0.59/175.0655*175.0655
=0.590

Current CPI (Mar. 2026) = 175.0655.

Cosan Quarterly Data

Book Value per Share CPI Adj_Book
201606 5.539 108.851 8.908
201609 6.018 109.986 9.579
201612 6.222 110.802 9.831
201703 6.864 111.869 10.742
201706 5.990 112.115 9.353
201709 6.229 112.777 9.669
201712 5.963 114.068 9.152
201803 5.947 114.868 9.064
201806 5.118 117.038 7.656
201809 4.701 117.881 6.981
201812 5.725 118.340 8.469
201903 5.545 120.124 8.081
201906 5.607 120.977 8.114
201909 5.858 121.292 8.455
201912 5.921 123.436 8.398
202003 5.203 124.092 7.340
202006 4.661 123.557 6.604
202009 4.355 125.095 6.095
202012 2.197 129.012 2.981
202103 3.217 131.660 4.278
202106 3.648 133.871 4.771
202109 4.883 137.913 6.198
202112 4.938 141.992 6.088
202203 6.112 146.537 7.302
202206 6.289 149.784 7.351
202209 6.579 147.800 7.793
202212 7.965 150.207 9.283
202303 7.533 153.352 8.600
202306 7.306 154.519 8.277
202309 7.510 155.464 8.457
202312 8.400 157.148 9.358
202403 8.198 159.372 9.005
202406 7.336 161.052 7.974
202409 6.952 162.342 7.497
202412 3.665 164.740 3.895
202503 2.728 168.102 2.841
202506 2.419 169.670 2.496
202509 2.017 170.739 2.068
202512 0.839 171.765 0.855
202603 0.590 175.066 0.590

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 €5.37 mean?
Cosan (FRA:9CI0) has a Cyclically Adjusted Book per Share of €5.37 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 Cosan and its competitors.
Is Cosan's Cyclically Adjusted Book per Share too high?
Cosan's current Cyclically Adjusted Book per Share is €5.37. Overall, Cosan has a GF Score™ of 74/100 and is considered Possible Value Trap, reflecting its overall financial health beyond just this single metric.
How does Cosan's Cyclically Adjusted Book per Share compare to VLO and MPC?
Cosan's Cyclically Adjusted Book per Share of €5.37 can be compared against companies in the Oil & Gas 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 Oil & Gas company?
A good Cyclically Adjusted Book per Share depends on the Oil & Gas 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 Cosan and its competitors. Cosan's current Cyclically Adjusted Book per Share is €5.37. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is Cosan stock overvalued right now?
Based on GuruFocus' analysis, Cosan (FRA:9CI0) is currently considered Possible Value Trap. The stock's GF Value™ is €4.83, compared to a current price of €2.66 — trading 44.9% below its estimated fair value. The current Cyclically Adjusted Book per Share is €5.37. Cosan's overall GF Score™ is 74/100 with 3 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 Cosan (FRA:9CI0), the current Cyclically Adjusted Book per Share is €5.37 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 Cosan (FRA:9CI0) Overvalued in 2026?

Based on GuruFocus' analysis, Cosan stock appears to be undervalued. The current stock price of €2.66 is trading 44.9% below its estimated GF Value™ of €4.83. GuruFocus considers Cosan to be Possible Value Trap.

Key valuation signals for FRA:9CI0:

  • Cyclically Adjusted Book per Share: €5.37
  • GF Value™: €4.83 vs. price of €2.66 (44.9% below fair value)
  • GF Score™: 74/100 with 3 warning signs

No single metric tells the full story. See the FRA:9CI0 stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.


Cosan Business Description

Industry EnergyOil & Gas
Other Exchanges CSAN:USACSAN3:Brazil
Address Avenue Brigadeiro Faria Lima, 4100 / 15th Floor Itaim Bibi, Sao Paulo, SP, BRA, 04538-132
Cosan SA engages in several services throughout the energy and logistics sectors. Its reportable segments are Raizen, Compass, Moove, Rumo, and Radar. It generates the majority of its revenue from Raizen which operates in the production, commercialization, origination, and trading of ethanol, bioenergy, resale, and trading of electricity, renewable sources, marketing, origination, and trading of sugar and fuels, and lubricant.
74GF Score

Get the complete analysis for FRA:9CI0

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

€2.66
Price
€4.83
GF Value