Taitien Electronics Co (ROCO:8289) E10: NT$1.39 (As of Dec. 2025)

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ROCO:8289 Taitien Electronics Co Ltd ROCO:8289
57 GF Score
Price NT$47.30
GF Value NT$28.50
Valuation Significantly Overvalued
! 3 Warning Signs
View Full Analysis

What is Taitien Electronics Co E10?

Taitien Electronics Co ROCO:8289 -9.73% 57 E10 is NT$1.39 as of Dec. 2025. GuruFocus rates ROCO:8289 with a GF Score™ of 57/100 and a GF Value™ of NT$28.50 (Significantly Overvalued). The stock has 3 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.

Taitien Electronics Co's adjusted earnings per share data for the three months ended in Dec. 2025 was NT$0.280. Add all the adjusted EPS for the past 10 years together and divide 10 will get our e10, which is NT$1.39 for the trailing ten years ended in Dec. 2025.

During the past 12 months, Taitien Electronics Co's average E10 Growth Rate was -4.10% per year. During the past 3 years, the average E10 Growth Rate was -0.70% per year. During the past 5 years, the average E10 Growth Rate was 19.50% 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 Taitien Electronics Co was 38.10% per year. The lowest was -0.70% per year. And the median was 21.00% per year.

As of today (2026-07-19), Taitien Electronics Co's current stock price is NT$47.30. Taitien Electronics Co's E10 for the quarter that ended in Dec. 2025 was NT$1.39. Taitien Electronics Co's Shiller PE Ratio of today is 34.03.

During the past 13 years, the highest Shiller PE Ratio of Taitien Electronics Co was 62.61. The lowest was 12.11. And the median was 20.96.


Taitien Electronics Co  (ROCO:8289) 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.

Taitien Electronics Co's Shiller P/E Ratio of today is calculated as

Shiller PE Ratio=Share Price/E10
=47.30/1.39
=34.03

* 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.

During the past 13 years, the highest Shiller P/E Ratio of Taitien Electronics Co was 62.61. The lowest was 12.11. And the median was 20.96.


Be Aware

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


Taitien Electronics Co E10 Related Terms


Taitien Electronics Co E10 Historical Data

* Premium members only.

The historical data trend for Taitien Electronics 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.

Taitien Electronics Co E10 Chart

Taitien Electronics 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 0.82 1.42 1.50 1.45 1.39

Taitien Electronics 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 1.45 1.49 1.43 1.37 1.39

ROCO:8289 vs COHR, KEYS, GRMN: E10 Comparison

For the Scientific & Technical Instruments subindustry, Taitien Electronics 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.


Taitien Electronics Co Shiller PE Ratio vs Hardware Industry

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

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


ROCO:8289
57GF Score
Taitien Electronics Co Ltd ROCO:8289
E10 is just one metric. See GF Score™, valuation, warning signs, and more.
View Full Analysis

Taitien Electronics 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, Taitien Electronics 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)
=0.28/324.0540*324.0540
=0.280

Current CPI (Dec. 2025) = 324.0540.

Taitien Electronics Co Quarterly Data

per share eps CPI Adj_EPS
201603 -0.002 238.132 -0.003
201606 0.189 241.018 0.254
201609 0.100 241.428 0.134
201612 0.256 241.432 0.344
201703 -0.344 243.801 -0.457
201706 0.278 244.955 0.368
201709 0.144 246.819 0.189
201712 0.078 246.524 0.103
201803 -0.567 249.554 -0.736
201806 0.456 251.989 0.586
201809 1.590 252.439 2.041
201812 0.080 251.233 0.103
201903 -0.100 254.202 -0.127
201906 -0.100 256.143 -0.127
201909 0.290 256.759 0.366
201912 -0.360 256.974 -0.454
202003 -0.090 258.115 -0.113
202006 0.100 257.797 0.126
202009 -0.120 260.280 -0.149
202012 0.170 260.474 0.211
202103 0.300 264.877 0.367
202106 0.710 271.696 0.847
202109 1.060 274.310 1.252
202112 1.040 278.802 1.209
202203 1.260 287.504 1.420
202206 1.720 296.311 1.881
202209 1.690 296.808 1.845
202212 0.530 296.797 0.579
202303 0.840 301.836 0.902
202306 0.270 305.109 0.287
202309 0.400 307.789 0.421
202312 -0.230 306.746 -0.243
202403 0.320 312.332 0.332
202406 0.190 314.175 0.196
202409 -0.260 315.301 -0.267
202412 0.150 315.605 0.154
202503 0.070 319.799 0.071
202506 -0.460 322.561 -0.462
202509 0.150 324.800 0.150
202512 0.280 324.054 0.280

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$1.39 mean?
Taitien Electronics Co (ROCO:8289) has a E10 of NT$1.39 as of Dec. 2025. E10 represents the company's inflation-adjusted earnings per share over a 10-year period. View historical data on Taitien Electronics Co and its competitors.
Is Taitien Electronics Co's E10 too high?
Taitien Electronics Co's current E10 is NT$1.39. Overall, Taitien Electronics Co has a GF Score™ of 57/100 and is considered Significantly Overvalued, reflecting its overall financial health beyond just this single metric.
How does Taitien Electronics Co's E10 compare to COHR and KEYS?
Taitien Electronics Co's E10 of NT$1.39 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 Taitien Electronics Co and its competitors. Taitien Electronics Co's current E10 is NT$1.39. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is Taitien Electronics Co stock overvalued right now?
Based on GuruFocus' analysis, Taitien Electronics Co (ROCO:8289) is currently considered Significantly Overvalued. The stock's GF Value™ is NT$28.50, compared to a current price of NT$47.30 — trading 66% above its estimated fair value. The current E10 is NT$1.39. Taitien Electronics Co's overall GF Score™ is 57/100 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 Taitien Electronics Co (ROCO:8289), the current E10 is NT$1.39 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 Taitien Electronics Co (ROCO:8289) Overvalued in 2026?

Based on GuruFocus' analysis, Taitien Electronics Co stock appears to be overvalued. The current stock price of NT$47.30 is trading 66% above its estimated GF Value™ of NT$28.50. GuruFocus considers Taitien Electronics Co to be Significantly Overvalued.

Key valuation signals for ROCO:8289:

  • E10: NT$1.39
  • GF Value™: NT$28.50 vs. price of NT$47.30 (66% above fair value)
  • GF Score™: 57/100 with 3 warning signs

No single metric tells the full story. See the ROCO:8289 stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.


Taitien Electronics Co Business Description

Address No.5, Shutan Street, Shulin District, New Taipei, TWN, 238
Taitien Electronics Co Ltd is a quartz frequency control component manufacturer. Its business activity includes Electronics components manufacturing, Wholesale of electronic materials, Retail Sale of electronic materials, International trading business, General instruments manufacturing, Data storage media units manufacturing, and Other electrical engineering and electronic machinery equipment manufacturing. Its products are Quartz Crystal, Crystal Oscillator, VCXO, TCXO, OCXO, Timing Module QCM, and Equipment.
57GF Score

Get the complete analysis for ROCO:8289

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

NT$47.30
Price
NT$28.50
GF Value