Inpex (MEX:1605N) E10: MXN0.00 (As of Dec. 2025)

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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.
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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
View Full Analysis

What is Inpex E10?

Inpex MEX:1605N 80 E10 is MXN0.00 as of Dec. 2025. GuruFocus rates MEX:1605N with a GF Score™ of 80/100 and a GF Value™ of MXN259.47. The stock has 3 warning signs investors should review.

Note: As E10 is a main component used to calculate Shiller PE Ratio. If the month end stock price for this stock is zero, result may not be accurate due to the exchange rate between different shares and the data will not be stored into our database. Selected historical data showed in the calculation sectione below is only for demostration purpose.

E10 is a concept invented by Prof. Robert Shiller, who uses E10 for his Shiller P/E calculation. E10 is the average of the inflation adjusted earnings of a company over the past 10 years.

Inpex's adjusted earnings per share data for the three months ended in Dec. 2025 was MXN9.860. Add all the adjusted EPS for the past 10 years together and divide 10 will get our e10, which is MXN0.00 for the trailing ten years ended in Dec. 2025.

During the past 12 months, Inpex's average E10 Growth Rate was 25.30% per year. During the past 3 years, the average E10 Growth Rate was 22.30% per year. During the past 5 years, the average E10 Growth Rate was 21.50% 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 E10 growth rate using E10 data.

During the past 13 years, the highest 3-Year average E10 Growth Rate of Inpex was 24.00% per year. The lowest was -7.80% per year. And the median was 18.20% per year.

As of today (2026-08-09), Inpex's current stock price is MXN416.80. Inpex's E10 for the quarter that ended in Dec. 2025 was MXN0.00. Inpex's Shiller PE Ratio of today is .

During the past 13 years, the highest Shiller PE Ratio of Inpex was 30.36. The lowest was 6.09. And the median was 15.07.


Inpex  (MEX:1605N) E10 Explanation

If a company grows much fast than inflation, E10 may underestimate the company's earnings power. Shiller PE Ratio can seem to be too high even the actual P/E is low.

For the Shiller P/E, the earnings of the past 10 years are inflation-adjusted and averaged. The result is used for P/E calculation. Since it looks at the average over the last 10 years, the Shiller P/E is also called PE10.

The Shiller P/E was first used by professor Robert Shiller to measure the valuation of the overall market. The same calculation is applied here to individual companies.

During the past 13 years, the highest Shiller P/E Ratio of Inpex was 30.36. The lowest was 6.09. And the median was 15.07.


Be Aware

Shiller PE Ratio works better for cyclical companies. It gives you a better idea on the company's real earnings power.


Inpex E10 Related Terms


Inpex E10 Historical Data

* Premium members only.

The historical data trend for Inpex's E10 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 E10 Chart

Inpex Annual Data
Trend Mar16 Mar17 Mar18 Mar19 Dec20 Dec21 Dec22 Dec23 Dec24 Dec25
E10
Get a 7-Day Free Trial Premium Member Only Premium Member Only 0.00 0.00 0.00 0.00 0.00

Inpex Quarterly Data
Jun21 Sep21 Dec21 Mar22 Jun22 Sep22 Dec22 Mar23 Jun23 Sep23 Dec23 Mar24 Jun24 Sep24 Dec24 Mar25 Jun25 Sep25 Dec25 Mar26
E10 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 0.00 0.00 0.00 0.00 0.00

MEX:1605N vs COP, EOG, FANG: E10 Comparison

For the Oil & Gas E&P subindustry, Inpex's Shiller PE Ratio, along with its competitors' market caps and Shiller PE 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 Shiller PE Ratio vs Oil & Gas Industry

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

* The bar in red indicates where Inpex's Shiller PE Ratio falls into.


MEX:1605N
80GF Score
Inpex Corp MEX:1605N
E10 is just one metric. See GF Score™, valuation, warning signs, and more.
View Full Analysis

Inpex E10 Calculation

E10 is a concept invented by Prof. Robert Shiller, who uses E10 for his Shiller P/E calculation. When we calculate the today's Shiller P/E ratio of a stock, we use today's price divided by E10.

What is E10? How do we calculate E10?

E10 is the average of the inflation adjusted earnings of a company over the past 10 years. Let's use an example to explain.

If we want to calculate the E10 of Wal-Mart (WMT) for Dec. 31, 2010, we need to have the inflation data and the earnings from 2001 through 2010.

We adjusted the earnings of 2001 earnings data with the total inflation from 2001 through 2010 to the equivalent earnings in 2010. If the total inflation from 2001 to 2010 is 40%, and Wal-Mart earned $1 a share in 2001, then the 2001's equivalent earnings in 2010 is $1.4 a share. If Wal-Mart earns $1 again in 2002, and the total inflation from 2002 through 2010 is 35%, then the equivalent 2002 earnings in 2010 is $1.35. So on and so forth, you get the equivalent earnings of past 10 years. Then you add them together and divided the sum by 10 to get E10.

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, Inpex's adjusted earnings per share data for the three months ended in Dec. 2025 was:

Adj_EPS= Earnings per Share (Diluted) /CPI of Dec. 2025 (Change)*Current CPI (Dec. 2025)
=9.86/113.0000*113.0000
=9.860

Current CPI (Dec. 2025) = 113.0000.

Inpex Quarterly Data

per share eps CPI Adj_EPS
201603 -5.289 97.900 -6.105
201606 0.946 98.100 1.090
201609 1.022 98.000 1.178
201612 3.919 98.400 4.500
201703 -0.202 98.100 -0.233
201706 2.234 98.500 2.563
201709 1.136 98.800 1.299
201712 2.768 99.400 3.147
201803 -1.531 99.200 -1.744
201806 2.055 99.200 2.341
201809 1.968 99.900 2.226
201812 3.423 99.700 3.880
201903 4.004 99.700 4.538
201906 3.615 99.800 4.093
201909 5.003 100.100 5.648
201912 6.400 100.500 7.196
202003 5.007 100.300 5.641
202006 -22.683 99.900 -25.657
202009 -0.663 99.900 -0.750
202012 1.801 99.300 2.049
202103 4.918 99.900 5.563
202106 1.708 99.500 1.940
202109 10.960 100.100 12.372
202112 10.732 100.100 12.115
202203 11.380 101.100 12.719
202206 9.771 101.800 10.846
202209 8.461 103.100 9.273
202212 20.848 104.100 22.630
202303 15.148 104.400 16.396
202306 9.437 105.200 10.137
202309 2.917 106.200 3.104
202312 3.871 106.800 4.096
202403 10.719 107.200 11.299
202406 8.392 108.200 8.764
202409 8.624 108.900 8.949
202412 15.365 110.700 15.684
202503 14.463 111.100 14.710
202506 10.574 111.700 10.697
202509 7.277 112.000 7.342
202512 9.860 113.000 9.860

Add all the adjusted EPS together and divide 10 will get our e10.

Frequently Asked Questions Learn more about E10 →
What does a E10 of MXN0.00 mean?
Inpex (MEX:1605N) has a E10 of MXN0.00 as of Dec. 2025. E10 represents the company's inflation-adjusted earnings per share over a 10-year period. View historical data on Inpex and its competitors.
Is Inpex's E10 too high?
Inpex's current E10 is MXN0.00. Overall, Inpex has a GF Score™ of 80/100, reflecting its overall financial health beyond just this single metric.
How does Inpex's E10 compare to COP and EOG?
Inpex's E10 of MXN0.00 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 E10 for an Oil & Gas company?
A good E10 depends on the Oil & Gas industry context. However, E10 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 E10 mean?
A high E10 can signal that a stock is expensive relative to its fundamentals. E10 represents the company's inflation-adjusted earnings per share over a 10-year period. View historical data on Inpex and its competitors. Inpex's current E10 is MXN0.00. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is Inpex stock overvalued right now?
Inpex (MEX:1605N) has a current E10 of MXN0.00. The stock's GF Value™ is MXN259.47, compared to a current price of MXN416.80 — trading 60.6% above its estimated fair value. The current E10 is MXN0.00. Inpex's overall GF Score™ is 80/100 with 3 warning signs to review. Investors should evaluate multiple metrics — including profitability, growth, and financial strength — before making a decision.
How is E10 calculated?
E10 is calculated from a company's financial statements. For Inpex (MEX:1605N), the current E10 is MXN0.00 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 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:

  • E10: MXN0.00
  • 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

E10 is just one metric. See GF Value™, 30-year financials, guru trades, warning signs, and more.

MXN416.80
Price
MXN259.47
GF Value