Silicon Optronics (TPE:3530) E10: NT$2.60 (As of Dec. 2025)


TPE:3530 Silicon Optronics Inc TPE:3530
71 GF Score
Price NT$68.20
GF Value NT$83.79
Valuation Modestly Undervalued
! 3 Warning Signs
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What is Silicon Optronics E10?

Silicon Optronics TPE:3530 -1.87% 71 E10 is NT$2.60 as of Dec. 2025. GuruFocus rates TPE:3530 with a GF Score™ of 71/100 and a GF Value™ of NT$83.79 (Modestly Undervalued). 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.

Silicon Optronics's adjusted earnings per share data for the three months ended in Dec. 2025 was NT$1.270. Add all the adjusted EPS for the past 10 years together and divide 10 will get our e10, which is NT$2.60 for the trailing ten years ended in Dec. 2025.

During the past 12 months, Silicon Optronics's average E10 Growth Rate was -1.10% 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.

As of today (2026-07-02), Silicon Optronics's current stock price is NT$68.20. Silicon Optronics's E10 for the quarter that ended in Dec. 2025 was NT$2.60. Silicon Optronics's Shiller PE Ratio of today is 26.23.

During the past 13 years, the highest Shiller PE Ratio of Silicon Optronics was 43.89. The lowest was 20.09. And the median was 27.95.


Silicon Optronics  (TPE:3530) 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.

Silicon Optronics's Shiller P/E Ratio of today is calculated as

Shiller PE Ratio=Share Price/E10
=68.20/2.60
=26.23

* 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 Silicon Optronics was 43.89. The lowest was 20.09. And the median was 27.95.


Be Aware

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


Silicon Optronics E10 Related Terms


Silicon Optronics E10 Historical Data

* Premium members only.

The historical data trend for Silicon Optronics'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.

Silicon Optronics E10 Chart

Silicon Optronics 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 3.11 2.63 2.60

Silicon Optronics 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 2.63 2.61 2.50 2.53 2.60

TPE:3530 vs NVDA, AVGO, MU: E10 Comparison

For the Semiconductors subindustry, Silicon Optronics'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.


Silicon Optronics Shiller PE Ratio vs Semiconductors Industry

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

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


TPE:3530
71GF Score
Silicon Optronics Inc TPE:3530
E10 is just one metric. See GF Score™, valuation, warning signs, and more.
View Full Analysis

Silicon Optronics 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, Silicon Optronics'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)
=1.27/324.0540*324.0540
=1.270

Current CPI (Dec. 2025) = 324.0540.

Silicon Optronics Quarterly Data

per share eps CPI Adj_EPS
201506 0.000 238.638 0.000
201512 0.000 236.525 0.000
201606 0.000 241.018 0.000
201612 0.000 241.432 0.000
201703 0.550 243.801 0.731
201706 0.590 244.955 0.781
201709 0.730 246.819 0.958
201712 1.140 246.524 1.499
201803 0.430 249.554 0.558
201806 0.550 251.989 0.707
201809 0.210 252.439 0.270
201812 0.980 251.233 1.264
201903 0.030 254.202 0.038
201906 0.520 256.143 0.658
201909 0.720 256.759 0.909
201912 0.740 256.974 0.933
202003 0.560 258.115 0.703
202006 0.160 257.797 0.201
202009 1.200 260.280 1.494
202012 1.720 260.474 2.140
202103 1.520 264.877 1.860
202106 3.210 271.696 3.829
202109 3.160 274.310 3.733
202112 1.650 278.802 1.918
202203 1.350 287.504 1.522
202206 0.790 296.311 0.864
202209 -0.040 296.808 -0.044
202212 -0.520 296.797 -0.568
202303 -2.090 301.836 -2.244
202306 -0.510 305.109 -0.542
202309 0.100 307.789 0.105
202312 -1.200 306.746 -1.268
202403 -0.180 312.332 -0.187
202406 -0.090 314.175 -0.093
202409 1.220 315.301 1.254
202412 -2.280 315.605 -2.341
202503 0.160 319.799 0.162
202506 -0.440 322.561 -0.442
202509 0.750 324.800 0.748
202512 1.270 324.054 1.270

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$2.60 mean?
Silicon Optronics (TPE:3530) has a E10 of NT$2.60 as of Dec. 2025. E10 represents the company's inflation-adjusted earnings per share over a 10-year period. View historical data on Silicon Optronics and its competitors.
Is Silicon Optronics' E10 too high?
Silicon Optronics' current E10 is NT$2.60. Overall, Silicon Optronics has a GF Score™ of 71/100 and is considered Modestly Undervalued, reflecting its overall financial health beyond just this single metric.
How does Silicon Optronics' E10 compare to NVDA and AVGO?
Silicon Optronics' E10 of NT$2.60 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 Silicon Optronics and its competitors. Silicon Optronics's current E10 is NT$2.60. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is Silicon Optronics stock overvalued right now?
Based on GuruFocus' analysis, Silicon Optronics (TPE:3530) is currently considered Modestly Undervalued. The stock's GF Value™ is NT$83.79, compared to a current price of NT$68.20 — trading 18.6% below its estimated fair value. The current E10 is NT$2.60. Silicon Optronics' overall GF Score™ is 71/100 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 Silicon Optronics (TPE:3530), the current E10 is NT$2.60 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 Silicon Optronics (TPE:3530) Overvalued in 2026?

Based on GuruFocus' analysis, Silicon Optronics stock appears to be undervalued. The current stock price of NT$68.20 is trading 18.6% below its estimated GF Value™ of NT$83.79. GuruFocus considers Silicon Optronics to be Modestly Undervalued.

Key valuation signals for TPE:3530:

  • E10: NT$2.60
  • GF Value™: NT$83.79 vs. price of NT$68.20 (18.6% below fair value)
  • GF Score™: 71/100 with 3 warning signs

No single metric tells the full story. See the TPE:3530 stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.


Silicon Optronics Business Description

Address Li Hsin 1st Road, 10-2, 4th Floor, East District, Hsin-Chu, TWN, 300
Silicon Optronics Inc is engaged in the design, development, and sale of complementary metal-oxide semiconductors. Its products include image sensors and shutters. The company derives revenue from complementary metal-oxide semiconductors. Geographically, it operates in Hong Kong, the United States, Taiwan, and other countries, with the majority of revenue deriving from Hong Kong.
71GF Score

Get the complete analysis for TPE:3530

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

NT$68.20
Price
NT$83.79
GF Value