The PE Ratio, or Price-to-Earnings ratio, or P/E Ratio, is a financial ratio used to compare a company's market price to its Earnings per Share (Diluted). As of today (2026-07-12), Silicon Optronics's share price is NT$65.20.
Silicon Optronics's Earnings per Share (Diluted) for the trailing twelve months (TTM) ended in Dec. 2025 was NT$1.74. Therefore, Silicon Optronics's PE Ratio for today is 37.47.
During the past 13 years, Silicon Optronics's highest PE Ratio was 456.29. The lowest was 10.05. And the median was 38.56.
Silicon Optronics's EPS (Diluted) for the
three
months ended in Dec. 2025 was NT$1.27.
Its EPS (Diluted) for the trailing twelve months (TTM) ended in Dec. 2025 was NT$1.74.
During the past 3 years, the average EPS without NRIGrowth Rate was 3.30% per year.
During the past 13 years, Silicon Optronics's highest 3-Year average EPS without NRI Growth Rate was 142.90% per year. The lowest was -26.20% per year. And the median was 5.00% per year.
Silicon Optronics's EPS (Basic) for the
three
months ended in Dec. 2025 was NT$1.27.
Its EPS (Basic) for the trailing twelve months (TTM) ended in Dec. 2025 was NT$1.74.
Back to Basics: PE Ratio
Silicon Optronics (TPE:3530) PE Ratio Explanation
The PE Ratio can be viewed as the number of years it takes for the company to earn back the price you pay for the stock. For example, if a company earns $2 a share per year, and the stock is traded at $30, the PE Ratio is 15. Therefore it takes 15 years for the company to earn back the $30 you paid for its stock, assuming the earnings stays constant over the next 15 years.
In real business, earnings never stay constant. If a company can grow its earnings, it takes fewer years for the company to earn back the price you pay for the stock. If a company's earnings decline it takes more years. As a shareholder, you want the company to earn back the price you pay as soon as possible. Therefore, lower P/E stocks are more attractive than higher P/E stocks so long as the PE Ratio is positive. Also for stocks with the same PE Ratio, the one with faster growth business is more attractive.
If a company loses money, the PE Ratio becomes meaningless.
To compare stocks with different growth rates, Peter Lynch invented a ratio called PEG Ratio. PEG Ratio is defined as the PE Ratio divided by the growth ratio. He thinks a company with a PE Ratio equal to its growth rate is fairly valued. Still he said he would rather buy a company growing 20% a year with a PE Ratio of 20, instead of a company growing 10% a year with a PE Ratio of 10.
Because the PE Ratio measures how long it takes to earn back the price you pay, the PE Ratio can be applied to the stocks across different industries. That is why it is the one of the most important and widely used indicators for the valuation of stocks.
Investors need to be aware that the PE Ratio can be misleading a lot of times, especially when the underlying business is cyclical and unpredictable. As Peter Lynch pointed out, cyclical businesses have higher profit margins at the peaks of the business cycles. Their earnings are high and PE Ratios are artificially low. It is usually a bad idea to buy a cyclical business when the PE Ratio is low. A better ratio to identify the time to buy a cyclical businesses is the PS Ratio.
PE Ratio can also be affected by non-recurring-items such as the sale of part of businesses. This may increase for the current year or quarter dramatically. But it cannot be repeated over and over. Therefore PE Ratio without NRI is a more accurate indication of valuation than PE Ratio.
Silicon Optronics PE Ratio Related Terms
Silicon Optronics PE Ratio Historical Data
* Premium members only.
The historical data trend for Silicon Optronics's PE Ratio 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.
For the Semiconductors subindustry, Silicon Optronics's PE Ratio, along with its competitors' market caps and 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 PE Ratio vs Semiconductors Industry
For the Semiconductors industry and Technology sector, Silicon Optronics's PE Ratio distribution charts can be found below:
* The bar in red indicates where Silicon Optronics's PE Ratio falls into.
The PE Ratio, or Price-to-Earnings ratio, or P/E Ratio, is a financial ratio used to compare a company's market price to its Earnings per Share (Diluted). It is the most widely used ratio in the valuation of stocks.
Silicon Optronics's Share Price of today is NT$65.20. Silicon Optronics's Earnings per Share (Diluted) for the trailing twelve months (TTM) ended in Dec. 2025 adds up the quarterly data reported by the company within the most recent 12 months, which was NT$1.74.
* 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.
It can also be calculated from the numbers for the whole company:
There are at least three kinds of PE Ratios used by different investors. They are Trailing Twelve Month PE Ratio, Forward PE Ratio, or PE Ratio without NRI. A new PE Ratio based on inflation-adjusted normalized PE Ratio is called Shiller PE Ratio, after Yale professor Robert Shiller.
In the calculation of PE Ratio, the earnings per share used are the earnings per share over the past 12 months. For Forward PE Ratio, the earnings are the expected earnings for the next twelve months. In the case of PE Ratio without NRI, the reported earnings less the non-recurring items are used.
For Shiller PE Ratio, the earnings of the past 10 years are inflation-adjusted and averaged. Since it looks at the average over the last 10 years, Shiller PE Ratio is also called PE10.
Silicon Optronics (TPE:3530) has a PE Ratio of 37.47 as of Jul. 12, 2026. P/E ratio is the ratio of share price to a company's earnings per share. View historical data on Silicon Optronics and its competitors. This is near median its historical median of 38.56. Over the past decade, Silicon Optronics' PE Ratio has ranged from 10.05 to 456.29.
Is Silicon Optronics' PE Ratio too high?
Silicon Optronics' current PE Ratio of 37.47 is near median its 10-year median of 38.56. Over the past 10 years, this metric has ranged from a low of 10.05 to a high of 456.29. Overall, Silicon Optronics has a GF Score™ of 70/100 and is considered Modestly Undervalued, reflecting its overall financial health beyond just this single metric.
How does Silicon Optronics' PE Ratio compare to NVDA and AVGO?
Silicon Optronics' PE Ratio of 37.47 can be compared against companies in the Semiconductors industry. Historically, Silicon Optronics' own PE Ratio has ranged from 10.05 to 456.29 over the past decade. See the competitive comparison table and distribution chart on this page for a detailed peer-by-peer breakdown.
What is a good PE Ratio for a Semiconductors company?
A good PE Ratio depends on the Semiconductors industry context. However, PE Ratio 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 PE Ratio mean?
A high PE Ratio can signal that a stock is expensive relative to its fundamentals. P/E ratio is the ratio of share price to a company's earnings per share. View historical data on Silicon Optronics and its competitors. Silicon Optronics's current PE Ratio is 37.47, which is near median its own 10-year median of 38.56. 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$83.71, compared to a current price of NT$65.20 — trading 22.1% below its estimated fair value. The current PE Ratio is 37.47, which is near median its 10-year median of 38.56. Silicon Optronics' overall GF Score™ is 70/100 with 3 warning signs to review. Investors should evaluate multiple metrics — including profitability, growth, and financial strength — before making a decision.
How is PE Ratio calculated?
PE Ratio is calculated from a company's financial statements. For Silicon Optronics (TPE:3530), the current PE Ratio is 37.47 as of Jul. 12, 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 Silicon Optronics (TPE:3530) Overvalued in 2026?
Based on GuruFocus' analysis, Silicon Optronics stock appears to be undervalued.
The current stock price of NT$65.20 is trading 22.1% below its estimated GF Value™ of NT$83.71.
GuruFocus considers Silicon Optronics to be Modestly Undervalued.
Key valuation signals for TPE:3530:
PE Ratio: 37.47 (near median its 10-year median of 38.56)
GF Value™: NT$83.71 vs. price of NT$65.20 (22.1% below fair value)
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 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.
70GF Score
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