Tekcore Co (ROCO:3339) E10: NT$-2.01 (As of Dec. 2025)


ROCO:3339 Tekcore Co Ltd ROCO:3339
51 GF Score
Price NT$42.10
GF Value NT$39.45
Valuation Fairly Valued
! 4 Warning Signs
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What is Tekcore Co E10?

Tekcore Co ROCO:3339 -2.43% 51 E10 is NT$-2.01 as of Dec. 2025. GuruFocus rates ROCO:3339 with a GF Score™ of 51/100 and a GF Value™ of NT$39.45 (Fairly Valued). The stock has 4 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.

Tekcore Co's adjusted earnings per share data for the three months ended in Dec. 2025 was NT$-0.440. Add all the adjusted EPS for the past 10 years together and divide 10 will get our e10, which is NT$-2.01 for the trailing ten years ended in Dec. 2025.

During the past 3 years, the average E10 Growth Rate was 38.10% per year. During the past 5 years, the average E10 Growth Rate was 25.30% 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 Tekcore Co was 38.10% per year. The lowest was -1.60% per year. And the median was 17.15% per year.

As of today (2026-07-03), Tekcore Co's current stock price is NT$42.10. Tekcore Co's E10 for the quarter that ended in Dec. 2025 was NT$-2.01. Tekcore Co's Shiller PE Ratio of today is .


Tekcore Co  (ROCO:3339) 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.


Tekcore Co E10 Related Terms


Tekcore Co E10 Historical Data

* Premium members only.

The historical data trend for Tekcore 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.

Tekcore Co E10 Chart

Tekcore 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 -9.86 -8.47 -6.29 -4.72 -2.01

Tekcore Co Quarterly Data
Mar21 Jun21 Sep21 Dec21 Mar22 Jun22 Sep22 Dec22 Mar23 Jun23 Sep23 Dec23 Mar24 Jun24 Sep24 Dec24 Mar25 Jun25 Sep25 Dec25
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 -4.72 -4.38 -3.98 -3.35 -2.01

ROCO:3339 vs NVDA, AVGO, MU: E10 Comparison

For the Semiconductors subindustry, Tekcore 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.


Tekcore Co Shiller PE Ratio vs Semiconductors Industry

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

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


ROCO:3339
51GF Score
Tekcore Co Ltd ROCO:3339
E10 is just one metric. See GF Score™, valuation, warning signs, and more.
View Full Analysis

Tekcore 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, Tekcore Co'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)
=-0.44/324.0540*324.0540
=-0.440

Current CPI (Dec. 2025) = 324.0540.

Tekcore Co Quarterly Data

per share eps CPI Adj_EPS
201603 -2.532 238.132 -3.446
201606 -1.952 241.018 -2.625
201609 -3.969 241.428 -5.327
201612 -0.215 241.432 -0.289
201703 -0.966 243.801 -1.284
201706 -0.536 244.955 -0.709
201709 0.043 246.819 0.056
201712 -0.043 246.524 -0.057
201803 0.107 249.554 0.139
201806 -0.043 251.989 -0.055
201809 -0.086 252.439 -0.110
201812 -0.472 251.233 -0.609
201903 -0.579 254.202 -0.738
201906 -0.365 256.143 -0.462
201909 -1.480 256.759 -1.868
201912 -1.058 256.974 -1.334
202003 -0.743 258.115 -0.933
202006 -0.521 257.797 -0.655
202009 0.140 260.280 0.174
202012 -0.060 260.474 -0.075
202103 0.540 264.877 0.661
202106 0.220 271.696 0.262
202109 0.300 274.310 0.354
202112 0.710 278.802 0.825
202203 -0.060 287.504 -0.068
202206 0.170 296.311 0.186
202209 -0.500 296.808 -0.546
202212 -0.082 296.797 -0.090
202303 0.040 301.836 0.043
202306 0.150 305.109 0.159
202309 0.200 307.789 0.211
202312 -0.110 306.746 -0.116
202403 0.140 312.332 0.145
202406 0.130 314.175 0.134
202409 0.050 315.301 0.051
202412 -0.080 315.605 -0.082
202503 -0.170 319.799 -0.172
202506 -1.070 322.561 -1.075
202509 -0.340 324.800 -0.339
202512 -0.440 324.054 -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$-2.01 mean?
Tekcore Co (ROCO:3339) has a E10 of NT$-2.01 as of Dec. 2025. E10 represents the company's inflation-adjusted earnings per share over a 10-year period. View historical data on Tekcore Co and its competitors.
Is Tekcore Co's E10 too high?
Tekcore Co's current E10 is NT$-2.01. Overall, Tekcore Co has a GF Score™ of 51/100 and is considered Fairly Valued, reflecting its overall financial health beyond just this single metric.
How does Tekcore Co's E10 compare to NVDA and AVGO?
Tekcore Co's E10 of NT$-2.01 can be compared against companies in the Semiconductors 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 Semiconductors company?
A good E10 depends on the Semiconductors 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 Tekcore Co and its competitors. Tekcore Co's current E10 is NT$-2.01. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is Tekcore Co stock overvalued right now?
Based on GuruFocus' analysis, Tekcore Co (ROCO:3339) is currently considered Fairly Valued. The stock's GF Value™ is NT$39.45, compared to a current price of NT$42.10 — trading 6.7% above its estimated fair value. The current E10 is NT$-2.01. Tekcore Co's overall GF Score™ is 51/100 with 4 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 Tekcore Co (ROCO:3339), the current E10 is NT$-2.01 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 Tekcore Co (ROCO:3339) Overvalued in 2026?

Based on GuruFocus' analysis, Tekcore Co stock appears to be overvalued. The current stock price of NT$42.10 is trading 6.7% above its estimated GF Value™ of NT$39.45. GuruFocus considers Tekcore Co to be Fairly Valued.

Key valuation signals for ROCO:3339:

  • E10: NT$-2.01
  • GF Value™: NT$39.45 vs. price of NT$42.10 (6.7% above fair value)
  • GF Score™: 51/100 with 4 warning signs

No single metric tells the full story. See the ROCO:3339 stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.


Tekcore Co Business Description

Address No. 18, Ziqiang 3rd Road, Nan-Kung Industrial Zone, Nantou County, Nantou, TWN
Tekcore Co Ltd engages in the manufacturing and sales of epitaxial wafers and chips for light-emitting diodes. The company specializes in high-brightness chips in green, blue, and ultraviolet wavelengths, as well as red, yellow, and orange chips to cover the various spectra of visible light. Its products are used in various applications, including large-scale displays and billboards; optical fiber cables; indicator lights; LCD and projection backlighting; low-light environments; miniaturized light sources; cell phones, cameras, and other small electronic displays.
51GF Score

Get the complete analysis for ROCO:3339

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

NT$42.10
Price
NT$39.45
GF Value