Lee Chang Yung Technology (TPE:4989) Peter Lynch Fair Value: N/A (As of Jul. 28, 2026)

Author: Vera Yuan Vera Yuan
Vera Yuan
Vera Yuan
Director of Data and Quant Analytics at GuruFocus
Focused on building reliable datasets, financial models, and research tools for value-minded investors. Committed to turning complex data into practical guidance for value-investing and long-term wealth.
Reviewed by: Charlie Tian Charlie Tian
Charlie Tian
Charlie Tian
Founder & CEO of GuruFocus
Dr. Charlie Tian is the founder and CEO of GuruFocus.com, a leading global investment research platform established in 2004. With a Ph.D. in physics, Dr. Tian transitioned from science to finance, applying a data-driven, disciplined approach to value investing.

TPE:4989 Lee Chang Yung Technology Corp TPE:4989
50 GF Score
Price NT$59.50
GF Value NT$16.57
Valuation Significantly Overvalued
! 4 Warning Signs
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What is Lee Chang Yung Technology Peter Lynch Fair Value?

Peter Lynch Fair Value applies to growing companies. The ideal range for the growth rate is between 10 - 20% a year. Peter Lynch thinks that the fair P/E value for a growth company equals its growth rate, that is PEG = 1. The earnings here is trailing twelve month (TTM) earnings. For non-bank companies, the growth rate we use is the average growth rate for EBITDA per share over the past 5 years. For Banks, the growth rate we use is the average growth rate for Book Value per share over the past 5 years. If 5-Year Growth Rate is greater than 25% a year, we use 25. If 5-Year Growth Rate is smaller than 5% a year, we do not calculate Peter Lynch Fair Value.


The historical rank and industry rank for Lee Chang Yung Technology's Peter Lynch Fair Value or its related term are showing as below:


During the past 13 years, the highest Price to Peter Lynch Fair Value Ratio of Lee Chang Yung Technology was 0.49. The lowest was 0.49. And the median was 0.49.


TPE:4989's Price-to-Peter-Lynch-Fair-Value is not ranked *
in the Metals & Mining industry.
Industry Median: 1.065
* Ranked among companies with meaningful Price-to-Peter-Lynch-Fair-Value only.

Note: Please don't confuse Peter Lynch Fair Value with the value reached in Peter Lynch Chart.


Lee Chang Yung Technology  (TPE:4989) Peter Lynch Fair Value Explanation

Peter Lynch Fair Value applies to growing companies. The ideal range for the growth rate is between 10 - 20% a year.

Peter Lynch thinks that the fair P/E value for a growth company equals its growth rate, that is PEG = 1. The earnings here is trailing twelve month (TTM) earnings. For non-bank companies, the growth rate we use is the average growth rate for EBITDA per share over the past 5 years. For Banks, the growth rate we use is the average growth rate for Book Value per share over the past 5 years.

Please don't confuse Peter Lynch Fair Value with the value reached in Peter Lynch Chart. In Peter Lynch chart, a fixed P/E ratio of 15 is used to draw the Earnings Line. Therefore the value reached has a P/E ratio of 15. But in Peter Lynch Fair Value calculation, P/E equals to the growth rate of EBITDA per share over the past 5 years, which is 0 instead of 15 in this case.

Lee Chang Yung Technology's Price to Peter Lynch Fair Value Ratio for today is calculated as

Price to Peter Lynch Fair Value=Share Price/Peter Lynch Fair Value
=59.50/N/A
=N/A

* 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.


Lee Chang Yung Technology Peter Lynch Fair Value Related Terms


Lee Chang Yung Technology Peter Lynch Fair Value Historical Data

* Premium members only.

The historical data trend for Lee Chang Yung Technology's Peter Lynch Fair Value 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.

Lee Chang Yung Technology Peter Lynch Fair Value Chart

Lee Chang Yung Technology Annual Data
Trend Dec16 Dec17 Dec18 Dec19 Dec20 Dec21 Dec22 Dec23 Dec24 Dec25
Peter Lynch Fair Value
Get a 7-Day Free Trial Premium Member Only Premium Member Only 0.00 0.00 0.00 0.00 0.00

Lee Chang Yung Technology Quarterly Data
Mar21 Jun21 Sep21 Dec21 Mar22 Jun22 Sep22 Dec22 Mar23 Jun23 Sep23 Dec23 Mar24 Jun24 Sep24 Dec24 Mar25 Jun25 Sep25 Dec25
Peter Lynch Fair Value 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 0.00 0.00 0.00 0.00 0.00

TPE:4989 vs SCCO, FCX: Peter Lynch Fair Value Comparison

For the Copper subindustry, Lee Chang Yung Technology's Price-to-Peter-Lynch-Fair-Value, along with its competitors' market caps and Price-to-Peter-Lynch-Fair-Value 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.


Lee Chang Yung Technology Price-to-Peter-Lynch-Fair-Value vs Metals & Mining Industry

For the Metals & Mining industry and Basic Materials sector, Lee Chang Yung Technology's Price-to-Peter-Lynch-Fair-Value distribution charts can be found below:

* The bar in red indicates where Lee Chang Yung Technology's Price-to-Peter-Lynch-Fair-Value falls into.


TPE:4989
50GF Score
Lee Chang Yung Technology Corp TPE:4989
Peter Lynch Fair Value is just one metric. See GF Score™, valuation, warning signs, and more.
View Full Analysis

Lee Chang Yung Technology Peter Lynch Fair Value Calculation

Lee Chang Yung Technology's Peter Lynch Fair Value for today is calculated as

Peter Lynch Fair Value=PEG Ratio*5-Year TTM EBITDA Growth Rate***EPS without NRI (TTM)
=1* N/A *-3.321
=N/A

Lee Chang Yung Technology's EPS without NRI 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$-3.32.


* 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.

** Please be aware that the 5-Year TTM EBITDA Growth Rate is calculated based on TTM data over the last 5 years. For quarterly reported companies, the TTM data adds up the quarterly data reported by the company within the most recent 12 months. For companies that report semi-annually, annually, or do not have enough quarterly data, GuruFocus uses the annual data as the TTM data.

If 5-Year Earnings Growth Rate is greater than 25% a year, we use 25.

If 5-Year Earnings Growth Rate is smaller than 5% a year, we do not calculate Peter Lynch Fair Value.

Please note that we use the 5-year average growth rate of EBITDA per share as the growth rate for non-bank companies, as EBITDA growth is subject to less manipulations than net earnings per share. For banks, we use the 5-year average growth rate of Book Value per share as the growth rate. The reason is that EBITDA is not applicable to Banks and Book value is a relative important measurement for Banks. In the calculation, PEG=1 because Peter Lynch thinks that the fair P/E ratio of the growth stock is equal to its earnings growth rate.

Is Lee Chang Yung Technology (TPE:4989) Overvalued in 2026?

Based on GuruFocus' analysis, Lee Chang Yung Technology stock appears to be overvalued. The current stock price of NT$59.50 is trading 259.1% above its estimated GF Value™ of NT$16.57. GuruFocus considers Lee Chang Yung Technology to be Significantly Overvalued.

Key valuation signals for TPE:4989:

  • Peter Lynch Fair Value: N/A
  • GF Value™: NT$16.57 vs. price of NT$59.50 (259.1% above fair value)
  • GF Score™: 50/100 with 4 warning signs

No single metric tells the full story. See the TPE:4989 stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.


Lee Chang Yung Technology Business Description

Address Bade Road, 5th Floor, No. 83, Section 4, Songshan District, Taipei City, TWN
Lee Chang Yung Technology Corp produces, manufactures, and sells electrolytic copper foil, an upstream material for printed circuit boards. The Group currently sells a single product, copper foil.
50GF Score

Get the complete analysis for TPE:4989

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

NT$59.50
Price
NT$16.57
GF Value