RTARF (Restar) Cyclically Adjusted Book per Share: $15.23 (As of Dec. 2025)


RTARF Restar Corp RTARF
85 GF Score
Price $14.30
GF Value $11.17
! 6 Warning Signs
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What is Restar Cyclically Adjusted Book per Share?

Restar RTARF 85 Cyclically Adjusted Book per Share is $15.23 as of Dec. 2025. GuruFocus rates RTARF with a GF Score™ of 85/100 and a GF Value™ of $11.17. The stock has 6 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.

Restar's adjusted book value per share for the three months ended in Dec. 2025 was $20.299. 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 $15.23 for the trailing ten years ended in Dec. 2025.

During the past 12 months, Restar's average Cyclically Adjusted Book Growth Rate was -100.00% 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 Restar was 1.30% per year. The lowest was 0.80% per year. And the median was 1.20% per year.

As of today (2026-06-28), Restar's current stock price is $14.30. Restar's Cyclically Adjusted Book per Share for the quarter that ended in Dec. 2025 was $15.23. Restar's Cyclically Adjusted PB Ratio of today is 0.94.

During the past 13 years, the highest Cyclically Adjusted PB Ratio of Restar was 1.48. The lowest was 0.46. And the median was 0.76.


Restar  (OTCPK:RTARF) 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.

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

Cyclically Adjusted PB Ratio=Share Price/Cyclically Adjusted Book per Share
=14.30/15.23
=0.94

* 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 Restar was 1.48. The lowest was 0.46. And the median was 0.76.


Be Aware

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


Restar Cyclically Adjusted Book per Share Related Terms


Restar Cyclically Adjusted Book per Share Historical Data

* Premium members only.

The historical data trend for Restar'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.

Restar Cyclically Adjusted Book per Share Chart

Restar Annual Data
Trend Mar17 Mar18 Mar19 Mar20 Mar21 Mar22 Mar23 Mar24 Mar25 Mar26
Cyclically Adjusted Book per Share
Get a 7-Day Free Trial Premium Member Only Premium Member Only 0.00 19.58 13.99 18.79 0.00

Restar 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 18.79 16.78 16.19 15.23 0.00

RTARF vs NVDA, AVGO, MU: Cyclically Adjusted Book per Share Comparison

For the Semiconductors subindustry, Restar'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.


Restar Cyclically Adjusted PB Ratio vs Semiconductors Industry

For the Semiconductors industry and Technology sector, Restar's Cyclically Adjusted PB Ratio distribution charts can be found below:

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


RTARF
85GF Score
Restar Corp RTARF
Cyclically Adjusted Book per Share is just one metric. See GF Score™, valuation, warning signs, and more.
View Full Analysis

Restar 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, Restar'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)
=20.299/113.0000*113.0000
=20.299

Current CPI (Dec. 2025) = 113.0000.

Restar Quarterly Data

Book Value per Share CPI Adj_Book
201603 26.327 97.900 30.388
201606 33.885 98.100 39.032
201609 35.083 98.000 40.453
201612 31.335 98.400 35.984
201703 20.728 98.100 23.876
201706 21.278 98.500 24.410
201709 21.427 98.800 24.507
201712 22.874 99.400 26.004
201803 23.631 99.200 26.918
201806 22.313 99.200 25.417
201809 22.580 99.900 25.541
201812 22.225 99.700 25.190
201903 22.013 99.700 24.950
201906 21.578 99.800 24.432
201909 21.869 100.100 24.687
201912 21.654 100.500 24.347
202003 21.740 100.300 24.493
202006 21.654 99.900 24.494
202009 22.522 99.900 25.475
202012 24.397 99.300 27.763
202103 22.460 99.900 25.405
202106 22.388 99.500 25.426
202109 22.769 100.100 25.703
202112 22.475 100.100 25.371
202203 21.779 101.100 24.343
202206 19.260 101.800 21.379
202209 18.375 103.100 20.139
202212 19.688 104.100 21.371
202303 20.125 104.400 21.783
202306 18.841 105.200 20.238
202309 18.539 106.200 19.726
202312 18.963 106.800 20.064
202403 18.719 107.200 19.732
202406 18.132 108.200 18.936
202409 22.909 108.900 23.772
202412 20.041 110.700 20.457
202503 20.506 111.100 20.857
202506 20.790 111.700 21.032
202509 20.867 112.000 21.053
202512 20.299 113.000 20.299

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 $15.23 mean?
Restar (RTARF) has a Cyclically Adjusted Book per Share of $15.23 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 Restar and its competitors.
Is Restar's Cyclically Adjusted Book per Share too high?
Restar's current Cyclically Adjusted Book per Share is $15.23. Overall, Restar has a GF Score™ of 85/100, reflecting its overall financial health beyond just this single metric.
How does Restar's Cyclically Adjusted Book per Share compare to NVDA and AVGO?
Restar's Cyclically Adjusted Book per Share of $15.23 can be compared against companies in the Semiconductors 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 Semiconductors company?
A good Cyclically Adjusted Book per Share depends on the Semiconductors 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 Restar and its competitors. Restar's current Cyclically Adjusted Book per Share is $15.23. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is Restar stock overvalued right now?
Restar (RTARF) has a current Cyclically Adjusted Book per Share of $15.23. The stock's GF Value™ is $11.17, compared to a current price of $14.30 — trading 28% above its estimated fair value. The current Cyclically Adjusted Book per Share is $15.23. Restar's overall GF Score™ is 85/100 with 6 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 Restar (RTARF), the current Cyclically Adjusted Book per Share is $15.23 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 Restar (RTARF) Overvalued in 2026?

Based on GuruFocus' analysis, Restar stock appears to be overvalued. The current stock price of $14.30 is trading 28% above its estimated GF Value™ of $11.17.

Key valuation signals for RTARF:

  • Cyclically Adjusted Book per Share: $15.23
  • GF Value™: $11.17 vs. price of $14.30 (28% above fair value)
  • GF Score™: 85/100 with 6 warning signs

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


Restar Business Description

Other Exchanges 3156:Japan
Address Lester Building, 10-9 Konan 2-chome, Minato-ku, Tokyo, JPN, 108-0075
Restar Corp manufactures and distributes semiconductors and electronic components. The company offers semiconductors/modules, optical components, displays, industrial lasers, sensors, measuring instruments/filters, batteries, quartz crystal devices, adhesive materials/optical materials, and speakers/receivers. It also provides electronic manufacturing services.
85GF Score

Get the complete analysis for RTARF

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

$14.30
Price
$11.17
GF Value