Tai-Tech Advanced Electronics Co (ROCO:3357) E10: NT$8.76 (As of Dec. 2025)

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ROCO:3357 Tai-Tech Advanced Electronics Co Ltd ROCO:3357
58 GF Score
Price NT$236.50
GF Value NT$153.94
Valuation Significantly Overvalued
! 3 Warning Signs
View Full Analysis

What is Tai-Tech Advanced Electronics Co E10?

Tai-Tech Advanced Electronics Co ROCO:3357 -5.40% 58 E10 is NT$8.76 as of Dec. 2025. GuruFocus rates ROCO:3357 with a GF Score™ of 58/100 and a GF Value™ of NT$153.94 (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.

Tai-Tech Advanced Electronics Co's adjusted earnings per share data for the three months ended in Dec. 2025 was NT$2.240. Add all the adjusted EPS for the past 10 years together and divide 10 will get our e10, which is NT$8.76 for the trailing ten years ended in Dec. 2025.

During the past 12 months, Tai-Tech Advanced Electronics Co's average E10 Growth Rate was 10.60% 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.

As of today (2026-07-16), Tai-Tech Advanced Electronics Co's current stock price is NT$236.50. Tai-Tech Advanced Electronics Co's E10 for the quarter that ended in Dec. 2025 was NT$8.76. Tai-Tech Advanced Electronics Co's Shiller PE Ratio of today is 27.00.

During the past 13 years, the highest Shiller PE Ratio of Tai-Tech Advanced Electronics Co was 39.73. The lowest was 11.14. And the median was 16.01.


Tai-Tech Advanced Electronics Co  (ROCO:3357) 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.

Tai-Tech Advanced Electronics Co's Shiller P/E Ratio of today is calculated as

Shiller PE Ratio=Share Price/E10
=236.50/8.76
=27.00

* 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 Tai-Tech Advanced Electronics Co was 39.73. The lowest was 11.14. And the median was 16.01.


Be Aware

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


Tai-Tech Advanced Electronics Co E10 Related Terms


Tai-Tech Advanced Electronics Co E10 Historical Data

* Premium members only.

The historical data trend for Tai-Tech Advanced 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.

Tai-Tech Advanced Electronics Co E10 Chart

Tai-Tech Advanced 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 0.00 0.00 7.52 7.92 8.76

Tai-Tech Advanced 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 7.92 8.22 8.40 8.67 8.76

ROCO:3357 vs APH, GLW: E10 Comparison

For the Electronic Components subindustry, Tai-Tech Advanced 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.


Tai-Tech Advanced Electronics Co Shiller PE Ratio vs Hardware Industry

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

* The bar in red indicates where Tai-Tech Advanced Electronics Co's Shiller PE Ratio falls into.


ROCO:3357
58GF Score
Tai-Tech Advanced Electronics Co Ltd ROCO:3357
E10 is just one metric. See GF Score™, valuation, warning signs, and more.
View Full Analysis

Tai-Tech Advanced 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, Tai-Tech Advanced 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)
=2.24/324.0540*324.0540
=2.240

Current CPI (Dec. 2025) = 324.0540.

Tai-Tech Advanced Electronics Co Quarterly Data

per share eps CPI Adj_EPS
201312 0.000 233.049 0.000
201403 0.750 236.293 1.029
201406 0.480 238.343 0.653
201412 0.000 234.812 0.000
201503 0.890 236.119 1.221
201506 0.670 238.638 0.910
201512 0.000 236.525 0.000
201606 0.000 241.018 0.000
201612 0.000 241.432 0.000
201706 0.000 244.955 0.000
201712 0.000 246.524 0.000
201806 0.000 251.989 0.000
201812 0.000 251.233 0.000
201906 0.000 256.143 0.000
201909 1.390 256.759 1.754
201912 1.690 256.974 2.131
202003 1.550 258.115 1.946
202006 2.520 257.797 3.168
202009 2.050 260.280 2.552
202012 1.910 260.474 2.376
202103 2.530 264.877 3.095
202106 3.470 271.696 4.139
202109 3.370 274.310 3.981
202112 2.580 278.802 2.999
202203 2.950 287.504 3.325
202206 3.410 296.311 3.729
202209 2.380 296.808 2.598
202212 1.300 296.797 1.419
202303 1.730 301.836 1.857
202306 1.660 305.109 1.763
202309 1.250 307.789 1.316
202312 1.100 306.746 1.162
202403 1.330 312.332 1.380
202406 1.820 314.175 1.877
202409 1.490 315.301 1.531
202412 2.200 315.605 2.259
202503 2.040 319.799 2.067
202506 2.860 322.561 2.873
202509 2.330 324.800 2.325
202512 2.240 324.054 2.240

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$8.76 mean?
Tai-Tech Advanced Electronics Co (ROCO:3357) has a E10 of NT$8.76 as of Dec. 2025. E10 represents the company's inflation-adjusted earnings per share over a 10-year period. View historical data on Tai-Tech Advanced Electronics Co and its competitors.
Is Tai-Tech Advanced Electronics Co's E10 too high?
Tai-Tech Advanced Electronics Co's current E10 is NT$8.76. Overall, Tai-Tech Advanced Electronics Co has a GF Score™ of 58/100 and is considered Significantly Overvalued, reflecting its overall financial health beyond just this single metric.
How does Tai-Tech Advanced Electronics Co's E10 compare to APH and GLW?
Tai-Tech Advanced Electronics Co's E10 of NT$8.76 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 Tai-Tech Advanced Electronics Co and its competitors. Tai-Tech Advanced Electronics Co's current E10 is NT$8.76. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is Tai-Tech Advanced Electronics Co stock overvalued right now?
Based on GuruFocus' analysis, Tai-Tech Advanced Electronics Co (ROCO:3357) is currently considered Significantly Overvalued. The stock's GF Value™ is NT$153.94, compared to a current price of NT$236.50 — trading 53.6% above its estimated fair value. The current E10 is NT$8.76. Tai-Tech Advanced Electronics Co's overall GF Score™ is 58/100 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 Tai-Tech Advanced Electronics Co (ROCO:3357), the current E10 is NT$8.76 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 Tai-Tech Advanced Electronics Co (ROCO:3357) Overvalued in 2026?

Based on GuruFocus' analysis, Tai-Tech Advanced Electronics Co stock appears to be overvalued. The current stock price of NT$236.50 is trading 53.6% above its estimated GF Value™ of NT$153.94. GuruFocus considers Tai-Tech Advanced Electronics Co to be Significantly Overvalued.

Key valuation signals for ROCO:3357:

  • E10: NT$8.76
  • GF Value™: NT$153.94 vs. price of NT$236.50 (53.6% above fair value)
  • GF Score™: 58/100 with 3 warning signs

No single metric tells the full story. See the ROCO:3357 stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.


Tai-Tech Advanced Electronics Co Business Description

Address No. 1, You 4th Road, Youth Industrial Park, Yangmei District, Taoyuan, TWN, 326013
Tai-Tech Advanced Electronics Co Ltd is engaged in the manufacturing and processing of electronic parts, magnet cores, multilayer wire-wound and other wire-wound products. The company focuses on the development, manufacturing and sales of magnetic materials and inductor components. The Company's revenue is derived from Wire-Wound Products, Multilayer Products, and Others.
58GF Score

Get the complete analysis for ROCO:3357

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

NT$236.50
Price
NT$153.94
GF Value