EFUN Technology Co (ROCO:3523) E10: NT$-3.36 (As of Jun. 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.

ROCO:3523 EFUN Technology Co Ltd ROCO:3523
38 GF Score
Price NT$15.40
GF Value NT$11.00
Valuation Significantly Overvalued
! 5 Warning Signs
View Full Analysis

What is EFUN Technology Co E10?

EFUN Technology Co ROCO:3523 38 E10 is NT$-3.36 as of Jun. 2026. GuruFocus rates ROCO:3523 with a GF Score™ of 38/100 and a GF Value™ of NT$11.00 (Significantly Overvalued). The stock has 5 warning signs investors should review.

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.

EFUN Technology Co's adjusted earnings per share data for the three months ended in Jun. 2026 was NT$-0.440. Add all the adjusted EPS for the past 10 years together and divide 10 will get our e10, which is NT$-3.36 for the trailing ten years ended in Jun. 2026.

During the past 3 years, the average E10 Growth Rate was 23.80% per year. During the past 5 years, the average E10 Growth Rate was 15.90% 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 EFUN Technology Co was 23.80% per year. The lowest was 2.40% per year. And the median was 11.20% per year.

As of today (2026-08-30), EFUN Technology Co's current stock price is NT$15.40. EFUN Technology Co's E10 for the quarter that ended in Jun. 2026 was NT$-3.36. EFUN Technology Co's Shiller PE Ratio of today is .


EFUN Technology Co  (ROCO:3523) 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.


Be Aware

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


EFUN Technology Co E10 Related Terms


EFUN Technology Co E10 Historical Data

* Premium members only.

The historical data trend for EFUN Technology Co'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.

EFUN Technology Co E10 Chart

EFUN Technology Co Annual Data
Trend Dec16 Dec17 Dec18 Dec19 Dec20 Dec21 Dec22 Dec23 Dec24 Dec25
E10
Get a 7-Day Free Trial Premium Member Only Premium Member Only -10.00 -9.19 -8.10 -5.61 -4.07

EFUN Technology Co Quarterly Data
Sep21 Dec21 Mar22 Jun22 Sep22 Dec22 Mar23 Jun23 Sep23 Dec23 Mar24 Jun24 Sep24 Dec24 Mar25 Jun25 Sep25 Dec25 Mar26 Jun26
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 -5.24 -5.06 -4.07 -3.71 -3.36

ROCO:3523 vs APH, GLW, TEL: E10 Comparison

For the Electronic Components subindustry, EFUN Technology Co'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.


EFUN Technology Co Shiller PE Ratio vs Hardware Industry

For the Hardware industry and Technology sector, EFUN Technology Co's Shiller PE Ratio distribution charts can be found below:

* The bar in red indicates where EFUN Technology Co's Shiller PE Ratio falls into.


ROCO:3523
38GF Score
EFUN Technology Co Ltd ROCO:3523
E10 is just one metric. See GF Score™, valuation, warning signs, and more.
View Full Analysis

EFUN Technology Co 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, EFUN Technology Co's adjusted earnings per share data for the three months ended in Jun. 2026 was:

Adj_EPS= Earnings per Share (Diluted) /CPI of Jun. 2026 (Change)*Current CPI (Jun. 2026)
=-0.44/333.9520*333.9520
=-0.440

Current CPI (Jun. 2026) = 333.9520.

EFUN Technology Co Quarterly Data

per share eps CPI Adj_EPS
201609 -3.667 241.428 -5.072
201612 -6.133 241.432 -8.483
201703 -3.467 243.801 -4.749
201706 -3.367 244.955 -4.590
201709 13.867 246.819 18.762
201712 -2.363 246.524 -3.201
201803 -1.400 249.554 -1.873
201806 -1.383 251.989 -1.833
201809 -2.000 252.439 -2.646
201812 -1.122 251.233 -1.491
201903 -0.783 254.202 -1.029
201906 -0.750 256.143 -0.978
201909 -0.817 256.759 -1.063
201912 -0.524 256.974 -0.681
202003 -0.633 258.115 -0.819
202006 -0.067 257.797 -0.087
202009 -0.450 260.280 -0.577
202012 -0.589 260.474 -0.755
202103 -0.490 264.877 -0.618
202106 -0.580 271.696 -0.713
202109 -0.470 274.310 -0.572
202112 -0.410 278.802 -0.491
202203 -0.450 287.504 -0.523
202206 -0.610 296.311 -0.687
202209 -0.290 296.808 -0.326
202212 -0.660 296.797 -0.743
202303 -0.750 301.836 -0.830
202306 -0.370 305.109 -0.405
202309 -0.610 307.789 -0.662
202312 -0.980 306.746 -1.067
202403 -0.490 312.332 -0.524
202406 -0.430 314.175 -0.457
202409 -0.610 315.301 -0.646
202412 -0.690 315.605 -0.730
202503 -0.430 319.799 -0.449
202506 -0.592 322.561 -0.613
202509 -0.470 324.800 -0.483
202512 0.040 324.054 0.041
202603 -0.450 330.213 -0.455
202606 -0.440 333.952 -0.440

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 NT$-3.36 mean?
EFUN Technology Co (ROCO:3523) has a E10 of NT$-3.36 as of Jun. 2026. E10 represents the company's inflation-adjusted earnings per share over a 10-year period. View historical data on EFUN Technology Co and its competitors.
Is EFUN Technology Co's E10 too high?
EFUN Technology Co's current E10 is NT$-3.36. Overall, EFUN Technology Co has a GF Score™ of 38/100 and is considered Significantly Overvalued, reflecting its overall financial health beyond just this single metric.
How does EFUN Technology Co's E10 compare to APH and GLW?
EFUN Technology Co's E10 of NT$-3.36 can be compared against companies in the Hardware 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 a Hardware company?
A good E10 depends on the Hardware 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 EFUN Technology Co and its competitors. EFUN Technology Co's current E10 is NT$-3.36. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is EFUN Technology Co stock overvalued right now?
Based on GuruFocus' analysis, EFUN Technology Co (ROCO:3523) is currently considered Significantly Overvalued. The stock's GF Value™ is NT$11.00, compared to a current price of NT$15.40 — trading 40% above its estimated fair value. The current E10 is NT$-3.36. EFUN Technology Co's overall GF Score™ is 38/100 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 EFUN Technology Co (ROCO:3523), the current E10 is NT$-3.36 as of Jun. 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 EFUN Technology Co (ROCO:3523) Overvalued in 2026?

Based on GuruFocus' analysis, EFUN Technology Co stock appears to be overvalued. The current stock price of NT$15.40 is trading 40% above its estimated GF Value™ of NT$11.00. GuruFocus considers EFUN Technology Co to be Significantly Overvalued.

Key valuation signals for ROCO:3523:

  • E10: NT$-3.36
  • GF Value™: NT$11.00 vs. price of NT$15.40 (40% above fair value)
  • GF Score™: 38/100 with 5 warning signs

No single metric tells the full story. See the ROCO:3523 stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.


EFUN Technology Co Business Description

Address No. 391, Section 2, Bentian Road, Annan District, Tainan, TWN, 70955
EFUN Technology Co Ltd is primarily engaged in the business related to optical film, electronic optical components, and solar photovoltaic power generation system construction.
38GF Score

Get the complete analysis for ROCO:3523

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

NT$15.40
Price
NT$11.00
GF Value