FDK (STU:5FN) E10: €0.00 (As of Mar. 2026)

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Director of Data and Quant Analytics at GuruFocus
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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.

STU:5FN FDK Corp STU:5FN
61 GF Score
Price €2.26
GF Value €2.78
! 5 Warning Signs
View Full Analysis

What is FDK E10?

FDK STU:5FN +4.63% 61 E10 is €0.00 as of Mar. 2026. GuruFocus rates STU:5FN with a GF Score™ of 61/100 and a GF Value™ of €2.78. The stock has 5 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.

FDK's adjusted earnings per share data for the three months ended in Mar. 2026 was €0.000. Add all the adjusted EPS for the past 10 years together and divide 10 will get our e10, which is €0.00 for the trailing ten years ended in Mar. 2026.

During the past 3 years, the average E10 Growth Rate was -33.60% per year. During the past 5 years, the average E10 Growth Rate was -33.10% 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 FDK was 64.20% per year. The lowest was -60.50% per year. And the median was -33.60% per year.

As of today (2026-07-13), FDK's current stock price is €2.26. FDK's E10 for the quarter that ended in Mar. 2026 was €0.00. FDK's Shiller PE Ratio of today is .

During the past 13 years, the highest Shiller PE Ratio of FDK was 1527.54. The lowest was 39.08. And the median was 235.53.


FDK  (STU:5FN) 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 FDK was 1527.54. The lowest was 39.08. And the median was 235.53.


Be Aware

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


FDK E10 Related Terms


FDK E10 Historical Data

* Premium members only.

The historical data trend for FDK'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.

FDK E10 Chart

FDK Annual Data
Trend Mar17 Mar18 Mar19 Mar20 Mar21 Mar22 Mar23 Mar24 Mar25 Mar26
E10
Get a 7-Day Free Trial Premium Member Only Premium Member Only -0.02 -0.03 -0.05 -0.07 0.00

FDK 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 -0.07 -0.08 -0.08 -0.10 0.00

STU:5FN vs VRT, BE: E10 Comparison

For the Electrical Equipment & Parts subindustry, FDK'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.


FDK Shiller PE Ratio vs Industrial Products Industry

For the Industrial Products industry and Industrials sector, FDK's Shiller PE Ratio distribution charts can be found below:

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


STU:5FN
61GF Score
FDK Corp STU:5FN
E10 is just one metric. See GF Score™, valuation, warning signs, and more.
View Full Analysis

FDK 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, FDK's adjusted earnings per share data for the three months ended in Mar. 2026 was:

Adj_EPS= Earnings per Share (Diluted) /CPI of Mar. 2026 (Change)*Current CPI (Mar. 2026)
=0/112.7000*112.7000
=0.000

Current CPI (Mar. 2026) = 112.7000.

FDK Quarterly Data

per share eps CPI Adj_EPS
201606 -0.215 98.100 -0.247
201609 -0.056 98.000 -0.064
201612 0.074 98.400 0.085
201703 -0.746 98.100 -0.857
201706 -0.081 98.500 -0.093
201709 0.029 98.800 0.033
201712 0.107 99.400 0.121
201803 -0.234 99.200 -0.266
201806 0.023 99.200 0.026
201809 0.083 99.900 0.094
201812 0.000 99.700 0.000
201903 -0.188 99.700 -0.213
201906 -0.284 99.800 -0.321
201909 0.125 100.100 0.141
201912 -0.059 100.500 -0.066
202003 -0.343 100.300 -0.385
202006 0.071 99.900 0.080
202009 0.048 99.900 0.054
202012 0.265 99.300 0.301
202103 0.079 99.900 0.089
202106 0.235 99.500 0.266
202109 0.082 100.100 0.092
202112 0.105 100.100 0.118
202203 -0.259 101.100 -0.289
202206 0.034 101.800 0.038
202209 0.085 103.100 0.093
202212 -0.016 104.100 -0.017
202303 -0.038 104.400 -0.041
202306 -0.022 105.200 -0.024
202309 0.014 106.200 0.015
202312 -0.003 106.800 -0.003
202403 0.031 107.200 0.033
202406 0.001 108.200 0.001
202409 0.063 108.900 0.065
202412 0.062 110.700 0.063
202503 -0.029 111.100 -0.029
202506 -0.019 111.700 -0.019
202509 0.038 112.000 0.038
202512 0.019 113.000 0.019
202603 0.000 112.700 0.000

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 €0.00 mean?
FDK (STU:5FN) has a E10 of €0.00 as of Mar. 2026. E10 represents the company's inflation-adjusted earnings per share over a 10-year period. View historical data on FDK and its competitors.
Is FDK's E10 too high?
FDK's current E10 is €0.00. Overall, FDK has a GF Score™ of 61/100, reflecting its overall financial health beyond just this single metric.
How does FDK's E10 compare to VRT and BE?
FDK's E10 of €0.00 can be compared against companies in the Industrial Products 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 Industrial Products company?
A good E10 depends on the Industrial Products 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 FDK and its competitors. FDK's current E10 is €0.00. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is FDK stock overvalued right now?
FDK (STU:5FN) has a current E10 of €0.00. The stock's GF Value™ is €2.78, compared to a current price of €2.26 — trading 18.7% below its estimated fair value. The current E10 is €0.00. FDK's overall GF Score™ is 61/100 with 5 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 FDK (STU:5FN), the current E10 is €0.00 as of Mar. 2026. 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 FDK (STU:5FN) Overvalued in 2026?

Based on GuruFocus' analysis, FDK stock appears to be undervalued. The current stock price of €2.26 is trading 18.7% below its estimated GF Value™ of €2.78.

Key valuation signals for STU:5FN:

  • E10: €0.00
  • GF Value™: €2.78 vs. price of €2.26 (18.7% below fair value)
  • GF Score™: 61/100 with 5 warning signs

No single metric tells the full story. See the STU:5FN stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.


FDK Business Description

Other Exchanges 6955:Japan
Address Hamagomu Bldg, 5-36-11 Shimbashi, Minato-ku, Tokyo, JPN, 105-8677
FDK Corp is a Japan-based company, engages in the manufacture and sale of electronic-related materials and products, as well as batteries. The company offers alkaline, nickel-metal hydride, lithium, and carbon-zinc batteries; and power storage systems, Li-ion capacitors, electric lights, and production systems for batteries. It also provides switching power supplies, coil devices, DC-DC power modules, multilayer power inductors, ceramic products, toners, and signal processing modules for LCDs.
61GF Score

Get the complete analysis for STU:5FN

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

€2.26
Price
€2.78
GF Value