Idemitsu Kosan Co (FRA:I7B) Cyclically Adjusted PB Ratio: (As of Sep. 21, 2026)

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Director of Data and Quant Analytics at GuruFocus
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FRA:I7B Idemitsu Kosan Co Ltd FRA:I7B
60 GF Score
Price €9.15
GF Value €6.16
Valuation Significantly Overvalued
! 8 Warning Signs
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What is Idemitsu Kosan Co Cyclically Adjusted PB Ratio?

Shiller PE for Stocks: The True Measure of Stock Valuation


Idemitsu Kosan Co  (FRA:I7B) Cyclically Adjusted PB Ratio Explanation

Compared with the regular PB Ratio, which works poorly for cyclical businesses, the Cyclically Adjusted PB Ratio smoothed out the fluctuations of book value during business cycles. Therefore it is more accurate in reflecting the valuation of the company.

If a company has consistent business performance, the Cyclically Adjusted PB Ratio should give similar results to regular PB Ratio.


Idemitsu Kosan Co Cyclically Adjusted PB Ratio Related Terms


Idemitsu Kosan Co Cyclically Adjusted PB Ratio Historical Data

* Premium members only.

The historical data trend for Idemitsu Kosan Co's Cyclically Adjusted PB Ratio 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.

Idemitsu Kosan Co Cyclically Adjusted PB Ratio Chart

Idemitsu Kosan Co Annual Data
Trend Mar17 Mar18 Mar19 Mar20 Mar21 Mar22 Mar23 Mar24 Mar25 Mar26
Cyclically Adjusted PB Ratio
Get a 7-Day Free Trial Premium Member Only Premium Member Only 0.72 0.56 0.87 0.85 1.08

Idemitsu Kosan Co Quarterly Data
Sep21 Dec21 Mar22 Jun22 Sep22 Dec22 Mar23 Jun23 Sep23 Dec23 Mar24 Jun24 Sep24 Dec24 Mar25 Jun25 Sep25 Dec25 Mar26 Jun26
Cyclically Adjusted PB Ratio 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 0.67 0.75 0.82 1.10 0.80

FRA:I7B vs MPC, VLO, PSX: Cyclically Adjusted PB Ratio Comparison

For the Oil & Gas Refining & Marketing subindustry, Idemitsu Kosan Co'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.


Idemitsu Kosan Co Cyclically Adjusted PB Ratio vs Oil & Gas Industry

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

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


FRA:I7B
60GF Score
Idemitsu Kosan Co Ltd FRA:I7B
Cyclically Adjusted PB Ratio is just one metric. See GF Score™, valuation, warning signs, and more.
View Full Analysis

Idemitsu Kosan Co Cyclically Adjusted PB Ratio Calculation

Like the Shiller PE Ratio, the Cyclically Adjusted PB Ratio takes the Book Value per Share from the past 10 years, adjusts it for inflation, and then calculates the average. This average is then used for the P/B calculation. Because it considers this 10-year average, it's often referred to as the CAPB Ratio.

The Shiller PE Ratio was first used by professor Robert Shiller to measure the valuation of the overall market. The similar calculation is applied by GuruFocus to calculate the Cyclically Adjusted PB Ratio.

Idemitsu Kosan Co's Cyclically Adjusted Book per Share for the quarter that ended in Jun. 2026 is calculated as:

For example, Idemitsu Kosan Co'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)
=7.529/113.6000*113.6000
=7.529

Current CPI (Jun. 2026) = 113.6000.

Idemitsu Kosan Co Quarterly Data

Book Value per Share CPI Adj_Book
201609 5.620 98.000 6.515
201612 5.575 98.400 6.436
201703 6.504 98.100 7.532
201706 6.193 98.500 7.142
201709 5.731 98.800 6.589
201712 6.276 99.400 7.173
201803 6.661 99.200 7.628
201806 6.905 99.200 7.907
201809 7.156 99.900 8.137
201812 7.454 99.700 8.493
201903 7.167 99.700 8.166
201906 7.115 99.800 8.099
201909 7.392 100.100 8.389
201912 7.096 100.500 8.021
202003 6.819 100.300 7.723
202006 5.956 99.900 6.773
202009 6.188 99.900 7.037
202012 6.145 99.300 7.030
202103 6.295 99.900 7.158
202106 6.674 99.500 7.620
202109 7.058 100.100 8.010
202112 6.998 100.100 7.942
202203 7.156 101.100 8.041
202206 7.557 101.800 8.433
202209 8.166 103.100 8.998
202212 7.928 104.100 8.651
202303 7.691 104.400 8.369
202306 7.303 105.200 7.886
202309 7.996 106.200 8.553
202312 8.429 106.800 8.966
202403 8.041 107.200 8.521
202406 8.174 108.200 8.582
202409 8.865 108.900 9.248
202412 8.742 110.700 8.971
202503 8.784 111.100 8.982
202506 8.200 111.700 8.339
202509 8.237 112.000 8.355
202512 7.949 113.000 7.991
202603 8.737 112.700 8.807
202606 7.529 113.600 7.529

Add all the adjusted book value per share together and divide the count will get our 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.

Is Idemitsu Kosan Co (FRA:I7B) Overvalued in 2026?

Based on GuruFocus' analysis, Idemitsu Kosan Co stock appears to be overvalued. The current stock price of €9.15 is trading 48.5% above its estimated GF Value™ of €6.16. GuruFocus considers Idemitsu Kosan Co to be Significantly Overvalued.

Key valuation signals for FRA:I7B:

  • Cyclically Adjusted PB Ratio:
  • GF Value™: €6.16 vs. price of €9.15 (48.5% above fair value)
  • GF Score™: 60/100 with 8 warning signs

No single metric tells the full story. See the FRA:I7B stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.


Idemitsu Kosan Co Business Description

Industry EnergyOil & Gas
Address 1-2-1 Otemachi, Chiyoda-ku, Tokyo, JPN, 100-8321
Idemitsu Kosan Co Ltd engages in a variety of activities globally that include petroleum products, oil exploration and production, coal, and other businesses. The company operates through five segments. The Basic Chemicals segment makes and sells olefins and aroma products. Electricity/Renewable Energy covers thermal, solar, and wind power generation, electricity sales, and solar business. Fuel Oil handles production, trading, and import/export of refined petroleum. The Highly Functional Materials segment includes lubricants, chemicals, electronic materials, paving materials, and agri-bio. The Resource segment explores, develops, and sells crude oil, natural gas, and coal. Others cover insurance and intra-group services. It generates the majority of its revenue from the Fuel oil segment.
60GF Score

Get the complete analysis for FRA:I7B

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

€9.15
Price
€6.16
GF Value