Inpex (MEX:1605N) Cyclically Adjusted PB Ratio: (As of Aug. 09, 2026)

Author: Vera Yuan Vera Yuan
Vera Yuan
Vera Yuan
Director of Data and Quant Analytics at GuruFocus
Focused on building reliable datasets, financial models, and research tools for value-minded investors. Committed to turning complex data into practical guidance for value-investing and long-term wealth.
Reviewed by: Charlie Tian Charlie Tian
Charlie Tian
Charlie Tian
Founder & CEO of GuruFocus
Dr. Charlie Tian is the founder and CEO of GuruFocus.com, a leading global investment research platform established in 2004. With a Ph.D. in physics, Dr. Tian transitioned from science to finance, applying a data-driven, disciplined approach to value investing.

MEX:1605N Inpex Corp MEX:1605N
80 GF Score
Price MXN416.80
GF Value MXN259.47
! 3 Warning Signs
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What is Inpex Cyclically Adjusted PB Ratio?

Note: If the price history is too short, we do not calculate current Cyclically Adjusted PB Ratio for this stock. All the historical data is shown as the company's primary share's data instead.

Shiller PE for Stocks: The True Measure of Stock Valuation


Inpex  (MEX:1605N) 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.


Inpex Cyclically Adjusted PB Ratio Related Terms


Inpex Cyclically Adjusted PB Ratio Historical Data

* Premium members only.

The historical data trend for Inpex'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.

Inpex Cyclically Adjusted PB Ratio Chart

Inpex Annual Data
Trend Mar16 Mar17 Mar18 Mar19 Dec20 Dec21 Dec22 Dec23 Dec24 Dec25
Cyclically Adjusted PB Ratio
Get a 7-Day Free Trial Premium Member Only Premium Member Only 0.51 0.64 0.81 0.76 1.11

Inpex Quarterly Data
Jun21 Sep21 Dec21 Mar22 Jun22 Sep22 Dec22 Mar23 Jun23 Sep23 Dec23 Mar24 Jun24 Sep24 Dec24 Mar25 Jun25 Sep25 Dec25 Mar26
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 0.77 0.75 0.97 1.11 0.00

MEX:1605N vs COP, EOG, FANG: Cyclically Adjusted PB Ratio Comparison

For the Oil & Gas E&P subindustry, Inpex'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.


Inpex Cyclically Adjusted PB Ratio vs Oil & Gas Industry

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

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


MEX:1605N
80GF Score
Inpex Corp MEX:1605N
Cyclically Adjusted PB Ratio is just one metric. See GF Score™, valuation, warning signs, and more.
View Full Analysis

Inpex 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.

Inpex's Cyclically Adjusted Book per Share for the quarter that ended in Dec. 2025 is calculated as:

For example, Inpex'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)
=470.417/113.0000*113.0000
=470.417

Current CPI (Dec. 2025) = 113.0000.

Inpex Quarterly Data

Book Value per Share CPI Adj_Book
201603 306.128 97.900 353.345
201606 336.965 98.100 388.145
201609 358.210 98.000 413.038
201612 354.397 98.400 406.980
201703 336.067 98.100 387.111
201706 326.646 98.500 374.731
201709 330.824 98.800 378.372
201712 354.918 99.400 403.478
201803 342.160 99.200 389.759
201806 360.116 99.200 410.213
201809 345.887 99.900 391.244
201812 359.301 99.700 407.232
201903 359.348 99.700 407.285
201906 359.352 99.800 406.882
201909 372.480 100.100 420.482
201912 359.985 100.500 404.759
202003 445.359 100.300 501.750
202006 411.718 99.900 465.707
202009 395.380 99.900 447.227
202012 359.161 99.300 408.713
202103 376.334 99.900 425.683
202106 362.624 99.500 411.824
202109 387.080 100.100 436.963
202112 406.048 100.100 458.376
202203 429.622 101.100 480.191
202206 431.834 101.800 479.344
202209 410.543 103.100 449.965
202212 415.842 104.100 451.394
202303 402.436 104.400 435.587
202306 396.272 105.200 425.653
202309 394.914 106.200 420.200
202312 394.374 106.800 417.268
202403 402.017 107.200 423.768
202406 458.254 108.200 478.583
202409 486.798 108.900 505.126
202412 545.916 110.700 557.258
202503 530.655 111.100 539.730
202506 499.159 111.700 504.968
202509 469.205 112.000 473.394
202512 470.417 113.000 470.417

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 Inpex (MEX:1605N) Overvalued in 2026?

Based on GuruFocus' analysis, Inpex stock appears to be overvalued. The current stock price of MXN416.80 is trading 60.6% above its estimated GF Value™ of MXN259.47.

Key valuation signals for MEX:1605N:

  • Cyclically Adjusted PB Ratio:
  • GF Value™: MXN259.47 vs. price of MXN416.80 (60.6% above fair value)
  • GF Score™: 80/100 with 3 warning signs

No single metric tells the full story. See the MEX:1605N stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.


Inpex Business Description

Industry EnergyOil & Gas
Address 3-1 Akasaka 5-chome, Akasaka Biz Tower, Minato-ku, Tokyo, JPN, 107-6332
Headquartered in Tokyo, Inpex was founded in 2008 through a merger with Teikoku Oil. The precursor Inpex began life in 1966 as North Sumatra Offshore Petroleum Exploration and discovered the Attaka field in Indonesia in 1970 before acquiring the ADMA Block offshore the United Arab Emirates in 1973 and then discovering the Kashagan oilfield in Kazakhstan and Ichthys and Abadi gasfields in the Timor Sea in 2000. Teikoku Oil was founded in 1941 as a semigovernment entity and discovered Japan's largest natural gas reserves in Minami-Nagaoka in 1979. Inpex is Japan's largest hydrocarbon producer, with oil and gas projects across multiple continents. It produces around 230 million barrels of oil equivalent per year and has 6.2 billion barrels of oil equivalent in proven and probable reserves.
80GF Score

Get the complete analysis for MEX:1605N

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

MXN416.80
Price
MXN259.47
GF Value