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Yankey Engineering CoTPE:6691 98 Graham Number is NT$170.42 as of Mar. 2026, which is 100% below its 10-year median of 1.88. GuruFocus rates TPE:6691 with a GF Score™ of 98/100 and a GF Value™ of NT$655.62 (Modestly Overvalued). The stock has 6 warning signs investors should review. Among 1,215 Construction companies, Yankey Engineering Co ranks worse than 91.44% on this metric.
Graham Number is a figure that measures a stock's fundamental value by taking into account the company's earnings per share and book value per share. The Graham number is the upper bound of the price range that a defensive investor should pay for the stock. According to the theory, any stock price below the Graham number is considered undervalued, and thus worth investing in.
As of today (2026-08-14), the stock price of Yankey Engineering Co is NT$728.00. Yankey Engineering Co's graham number for the quarter that ended in Mar. 2026 was NT$170.42. Therefore, Yankey Engineering Co's Price to Graham Number ratio for today is 4.27.
The historical rank and industry rank for Yankey Engineering Co's Graham Number or its related term are showing as below:
TPE:6691'
s Price-to-Graham-Number Range Over the Past 10 Years
Min: 0.86 Med: 1.88 Max: 4.28
Current: 4.27
During the past 12 years, the highest Price to Graham Number ratio of Yankey Engineering Co was 4.28. The lowest was 0.86. And the median was 1.88.
TPE:6691's Price-to-Graham-Number is ranked worse than 91.44% of 1215
companies
in the Construction industry
Industry Median: 1.01
vs TPE:6691: 4.27
Graham Number is a combination of asset valuation and earnings power valuation. It is a very conservative way of valuing a stock.
Yankey Engineering Co (TPE:6691) Graham Number Explanation
Ben Graham actually did not publish a formula like this. But he wrote in The Intelligent Investor (1948 version) regarding to the criteria for purchases:
Current price should not be more than 15 times average earnings of the past three years.
Current price should not be more than 1.5 times the book value last reported. However, a multiplier of earnings below 15 could justify a correspondingly higher multiplier of assets. As a rule of thumb we suggest that the product of the multiplier times the ratio of price to book value should not exceed 22.5. (This figure corresponds to 15 times earnings and 1.5 times book value. It would admit an issue selling at only 9 times earnings and 2.5 times asset value, etc.)
Unlike valuation methods such as DCF or Discounted Earnings, the Graham number does not take growth into the valuation. Unlike the valuation methods based on book value alone, it takes into account the earnings power. Therefore, the Graham Number is a combination of asset valuation and earnings power valuation.
In general, the Graham number is a very conservative way of valuing a stock. It cannot be applied to companies with negative book values.
Yankey Engineering Co's Price to Graham number Ratio for today is calculated as
Price to Graham number
=
Share Price (Today)
/
Graham number (Q: Mar. 2026 )
=
728.00
/
170.42
=
4.27
* 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.
Be Aware
Please keep these in mind:
1. Graham Number does not take growth into account. Therefore it underestimates the values of the companies that have good earnings growth. We feel that if the earnings per share grows more than 10% a year, Graham Number underestimates the value.
2. Graham Number punishes the companies that have temporarily low earnings. Therefore, an average of earnings makes more sense in the calculation of Graham Number.
3. Graham Numbers underestimates companies that are light with book.
Yankey Engineering Co Graham Number Related Terms
Yankey Engineering Co Graham Number Historical Data
* Premium members only.
The historical data trend for Yankey Engineering Co's Graham Number 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.
TPE:6691 vs PWR, FIX, EME: Graham Number Comparison
For the Engineering & Construction subindustry, Yankey Engineering Co's Price-to-Graham-Number, along with its competitors' market caps and Price-to-Graham-Number 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.
Yankey Engineering Co Price-to-Graham-Number vs Construction Industry
For the Construction industry and Industrials sector, Yankey Engineering Co's Price-to-Graham-Number distribution charts can be found below:
* The bar in red indicates where Yankey Engineering Co's Price-to-Graham-Number falls into.
* 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.
Yankey Engineering Co (TPE:6691) has a Graham Number of NT$170.42 as of Mar. 2026. The Graham Number values a company based on its per-share earnings and book value. View historical data on Yankey Engineering Co and its competitors. This is 8965% above median its historical median of 1.88. Over the past decade, Yankey Engineering Co's Graham Number has ranged from 0.86 to 4.28. According to the industry distribution chart, Yankey Engineering Co ranks #1111 out of 1215 companies in the Construction industry, placing it in the top 91.4%.
Is Yankey Engineering Co's Graham Number too high?
Yankey Engineering Co's current Graham Number of NT$170.42 is 8965% above median its 10-year median of 1.88. Over the past 10 years, this metric has ranged from a low of 0.86 to a high of 4.28. Based on the distribution chart, Yankey Engineering Co ranks #1111 out of 1215 companies in the Construction industry, which is in the bottom quartile relative to peers. Overall, Yankey Engineering Co has a GF Score™ of 98/100 and is considered Modestly Overvalued, reflecting its overall financial health beyond just this single metric.
How does Yankey Engineering Co's Graham Number compare to PWR and FIX?
According to the Construction industry distribution chart, Yankey Engineering Co ranks #1111 out of 1215 companies for Graham Number. This places Yankey Engineering Co in the lower half of its industry. The industry median Graham Number is 1.01. Historically, Yankey Engineering Co's own Graham Number has ranged from 0.86 to 4.28 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 Graham Number for a Construction company?
The median Graham Number among Construction companies is 1.01, based on 1,215 companies in the industry. Companies in the top quartile (top 25%) have a Graham Number significantly above this median, while those in the bottom quartile fall well below. However, Graham Number 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 Graham Number mean?
A high Graham Number can signal that a stock is expensive relative to its fundamentals. The Graham Number values a company based on its per-share earnings and book value. View historical data on Yankey Engineering Co and its competitors. For the Construction industry, the median Graham Number is 1.01 — values significantly above this may indicate overvaluation, while values below may suggest a bargain or underlying issues. Yankey Engineering Co's current Graham Number is NT$170.42, which is 8965% above median its own 10-year median of 1.88. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is Yankey Engineering Co stock overvalued right now?
Based on GuruFocus' analysis, Yankey Engineering Co (TPE:6691) is currently considered Modestly Overvalued. The stock's GF Value™ is NT$655.62, compared to a current price of NT$728.00 — trading 11% above its estimated fair value. The current Graham Number is NT$170.42, which is 8965% above median its 10-year median of 1.88. Yankey Engineering Co's overall GF Score™ is 98/100 with 6 warning signs to review. Investors should evaluate multiple metrics — including profitability, growth, and financial strength — before making a decision.
How is Graham Number calculated?
Graham Number is calculated from a company's financial statements. For Yankey Engineering Co (TPE:6691), the current Graham Number is NT$170.42 as of Mar. 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 Yankey Engineering Co (TPE:6691) Overvalued in 2026?
Based on GuruFocus' analysis, Yankey Engineering Co stock appears to be overvalued.
The current stock price of NT$728.00 is trading 11% above its estimated GF Value™ of NT$655.62.
GuruFocus considers Yankey Engineering Co to be Modestly Overvalued.
Key valuation signals for TPE:6691:
Graham Number: NT$170.42 (8965% above median its 10-year median of 1.88)
GF Value™: NT$655.62 vs. price of NT$728.00 (11% above fair value)
No single metric tells the full story. See the TPE:6691 stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.
Yankey Engineering Co Ltd is engaged in the design and installation of clean room systems, refrigeration, air conditioning systems, and ice-making systems, as well as the sales of materials for these systems. The various services offered by the company include clean room system engineering, high and low voltage transmission system installation, design and construction of fire, water, and electrical systems, and providing comprehensive MEP (Mechanical, Electrical, Plumbing) turnkey services for commercial office buildings, among others. Geographically, the company generates the majority of its revenue from Taiwan and the rest from China, Thailand, Malaysia, and the USA.
98GF Score
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