istyle (FRA:IY5) Cyclically Adjusted Book per Share: €0.79 (As of Dec. 2025)

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FRA:IY5 istyle Inc FRA:IY5
81 GF Score
Price €2.10
GF Value €2.17
Valuation Fairly Valued
! 2 Warning Signs
View Full Analysis

What is istyle Cyclically Adjusted Book per Share?

istyle FRA:IY5 -2.78% 81 Cyclically Adjusted Book per Share is €0.79 as of Dec. 2025. GuruFocus rates FRA:IY5 with a GF Score™ of 81/100 and a GF Value™ of €2.17 (Fairly Valued). The stock has 2 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.

istyle's adjusted book value per share for the three months ended in Dec. 2025 was €1.187. 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 €0.79 for the trailing ten years ended in Dec. 2025.

During the past 12 months, istyle's average Cyclically Adjusted Book Growth Rate was 9.40% per year. During the past 3 years, the average Cyclically Adjusted Book Growth Rate was 8.70% 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 istyle was 8.70% per year. The lowest was 8.70% per year. And the median was 8.70% per year.

As of today (2026-07-19), istyle's current stock price is €2.10. istyle's Cyclically Adjusted Book per Share for the quarter that ended in Dec. 2025 was €0.79. istyle's Cyclically Adjusted PB Ratio of today is 2.66.

During the past 13 years, the highest Cyclically Adjusted PB Ratio of istyle was 6.28. The lowest was 1.44. And the median was 3.47.


istyle  (FRA:IY5) 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.

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

Cyclically Adjusted PB Ratio=Share Price/Cyclically Adjusted Book per Share
=2.10/0.79
=2.66

* 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 istyle was 6.28. The lowest was 1.44. And the median was 3.47.


Be Aware

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


istyle Cyclically Adjusted Book per Share Related Terms


istyle Cyclically Adjusted Book per Share Historical Data

* Premium members only.

The historical data trend for istyle'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.

istyle Cyclically Adjusted Book per Share Chart

istyle Annual Data
Trend Jun16 Jun17 Jun18 Jun19 Jun20 Jun21 Jun22 Jun23 Jun24 Jun25
Cyclically Adjusted Book per Share
Get a 7-Day Free Trial Premium Member Only Premium Member Only 0.00 0.78 0.76 0.76 0.83

istyle 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 0.85 0.83 0.83 0.79 0.00

FRA:IY5 vs CASY, WSM, DKS: Cyclically Adjusted Book per Share Comparison

For the Specialty Retail subindustry, istyle'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.


istyle Cyclically Adjusted PB Ratio vs Retail - Cyclical Industry

For the Retail - Cyclical industry and Consumer Cyclical sector, istyle's Cyclically Adjusted PB Ratio distribution charts can be found below:

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


FRA:IY5
81GF Score
istyle Inc FRA:IY5
Cyclically Adjusted Book per Share is just one metric. See GF Score™, valuation, warning signs, and more.
View Full Analysis

istyle 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, istyle's adjusted Book Value per Share data for the three months ended in Dec. 2025 was:

Adj_Book= Book Value per Share /CPI of Dec. 2025 (Change)*Current CPI (Dec. 2025)
=1.187/113.0000*113.0000
=1.187

Current CPI (Dec. 2025) = 113.0000.

istyle Quarterly Data

Book Value per Share CPI Adj_Book
201603 0.719 97.900 0.830
201606 0.830 98.100 0.956
201609 0.897 98.000 1.034
201612 0.878 98.400 1.008
201703 0.970 98.100 1.117
201706 1.379 98.500 1.582
201709 1.307 98.800 1.495
201712 1.344 99.400 1.528
201803 1.362 99.200 1.551
201806 1.414 99.200 1.611
201809 1.375 99.900 1.555
201812 1.378 99.700 1.562
201903 1.412 99.700 1.600
201906 1.325 99.800 1.500
201909 1.319 100.100 1.489
201912 0.828 100.500 0.931
202003 0.792 100.300 0.892
202006 0.668 99.900 0.756
202009 0.616 99.900 0.697
202012 0.735 99.300 0.836
202103 0.661 99.900 0.748
202106 0.840 99.500 0.954
202109 0.858 100.100 0.969
202112 0.825 100.100 0.931
202203 0.872 101.100 0.975
202206 0.836 101.800 0.928
202209 0.891 103.100 0.977
202212 0.880 104.100 0.955
202303 0.881 104.400 0.954
202306 0.895 105.200 0.961
202309 0.813 106.200 0.865
202312 0.845 106.800 0.894
202403 0.879 107.200 0.927
202406 0.896 108.200 0.936
202409 0.991 108.900 1.028
202412 1.036 110.700 1.058
202503 0.956 111.100 0.972
202506 1.136 111.700 1.149
202509 1.208 112.000 1.219
202512 1.187 113.000 1.187

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 €0.79 mean?
istyle (FRA:IY5) has a Cyclically Adjusted Book per Share of €0.79 as of Dec. 2025. 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 istyle and its competitors.
Is istyle's Cyclically Adjusted Book per Share too high?
istyle's current Cyclically Adjusted Book per Share is €0.79. Overall, istyle has a GF Score™ of 81/100 and is considered Fairly Valued, reflecting its overall financial health beyond just this single metric.
How does istyle's Cyclically Adjusted Book per Share compare to CASY and WSM?
istyle's Cyclically Adjusted Book per Share of €0.79 can be compared against companies in the Retail - Cyclical 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 Retail - Cyclical company?
A good Cyclically Adjusted Book per Share depends on the Retail - Cyclical 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 istyle and its competitors. istyle's current Cyclically Adjusted Book per Share is €0.79. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is istyle stock overvalued right now?
Based on GuruFocus' analysis, istyle (FRA:IY5) is currently considered Fairly Valued. The stock's GF Value™ is €2.17, compared to a current price of €2.10 — trading 3.2% below its estimated fair value. The current Cyclically Adjusted Book per Share is €0.79. istyle's overall GF Score™ is 81/100 with 2 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 istyle (FRA:IY5), the current Cyclically Adjusted Book per Share is €0.79 as of Dec. 2025. 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 istyle (FRA:IY5) Overvalued in 2026?

Based on GuruFocus' analysis, istyle stock appears to be undervalued. The current stock price of €2.10 is trading 3.2% below its estimated GF Value™ of €2.17. GuruFocus considers istyle to be Fairly Valued.

Key valuation signals for FRA:IY5:

  • Cyclically Adjusted Book per Share: €0.79
  • GF Value™: €2.17 vs. price of €2.10 (3.2% below fair value)
  • GF Score™: 81/100 with 2 warning signs

No single metric tells the full story. See the FRA:IY5 stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.


istyle Business Description

Other Exchanges 3660:Japan
Address 34F ARK Mori Building, 1-12-32, Akasaka, Minato-ku, Tokyo, JPN, 107-6034
istyle Inc is engaged in the operation of cosmetics portal Website under the name @cosme. The company operates its business through Media, Electronic Commerce and Store segment. The Media segment involves in the provision of various services including Internet advertising services, such as response advertisings, branding advertisings and affiliate advertisings. The Electronic Commerce segment is engaged in the purchase and sale of cosmetics, quasi drugs, health foods through operating cosmetics online shopping site and the Store segment is involves in the plan and development of cosmetics retail business categories, and the operation of cosmetics retail stores.
81GF Score

Get the complete analysis for FRA:IY5

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

€2.10
Price
€2.17
GF Value