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.
The historical rank and industry rank for Prosper Engineering PCL's Graham Number or its related term are showing as below:
During the past 8 years, the highest Price to Graham Number ratio of Prosper Engineering PCL was 2.22. The lowest was 1.64. And the median was 1.90.
BKK:PROS's Price-to-Graham-Number is not ranked *
in the Construction industry.
Industry Median: 1.02 * Ranked among companies with meaningful Price-to-Graham-Number only.
Graham Number is a combination of asset valuation and earnings power valuation. It is a very conservative way of valuing a stock.
Prosper Engineering PCL (BKK:PROS) 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.
Prosper Engineering PCL's Price to Graham number Ratio for today is calculated as
Price to Graham number
=
Share Price (Today)
/
Graham number (Q: Mar. 2026 )
=
0.16
/
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.
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.
Prosper Engineering PCL Graham Number Related Terms
Prosper Engineering PCL Graham Number Historical Data
* 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.
BKK:PROS vs PWR, FIX, EME: Graham Number Comparison
For the Engineering & Construction subindustry, Prosper Engineering PCL'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.
Prosper Engineering PCL Price-to-Graham-Number vs Construction Industry
For the Construction industry and Industrials sector, Prosper Engineering PCL's Price-to-Graham-Number distribution charts can be found below:
* The bar in red indicates where Prosper Engineering PCL'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.
Prosper Engineering PCL (BKK:PROS) has a Graham Number of ฿N/A as of Mar. 2026. The Graham Number values a company based on its per-share earnings and book value. View historical data on Prosper Engineering PCL and its competitors. Over the past decade, Prosper Engineering PCL's Graham Number has ranged from 1.64 to 2.22. According to the industry distribution chart, Prosper Engineering PCL ranks #999999 out of 1215 companies in the Construction industry.
Is Prosper Engineering PCL's Graham Number too high?
Prosper Engineering PCL's current Graham Number is ฿N/A. Over the past 10 years, this metric has ranged from a low of 1.64 to a high of 2.22. Based on the distribution chart, Prosper Engineering PCL ranks #999999 out of 1215 companies in the Construction industry, which is in the bottom quartile relative to peers. Overall, Prosper Engineering PCL has a GF Score™ of 28/100 and is considered Possible Value Trap, reflecting its overall financial health beyond just this single metric.
How does Prosper Engineering PCL's Graham Number compare to PWR and FIX?
According to the Construction industry distribution chart, Prosper Engineering PCL ranks #999999 out of 1215 companies for Graham Number. This places Prosper Engineering PCL in the lower half of its industry. The industry median Graham Number is 1.02. Historically, Prosper Engineering PCL's own Graham Number has ranged from 1.64 to 2.22 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 1.02, 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 Prosper Engineering PCL and its competitors. For the Construction industry, the median Graham Number is 1.02 — values significantly above this may indicate overvaluation, while values below may suggest a bargain or underlying issues. Prosper Engineering PCL's current Graham Number is ฿N/A. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is Prosper Engineering PCL stock overvalued right now?
Based on GuruFocus' analysis, Prosper Engineering PCL (BKK:PROS) is currently considered Possible Value Trap. The stock's GF Value™ is ฿0.43, compared to a current price of ฿0.16 — trading 62.8% below its estimated fair value. The current Graham Number is ฿N/A. Prosper Engineering PCL's overall GF Score™ is 28/100 with 5 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 Prosper Engineering PCL (BKK:PROS), the current Graham Number is ฿N/A 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 Prosper Engineering PCL (BKK:PROS) Overvalued in 2026?
Based on GuruFocus' analysis, Prosper Engineering PCL stock appears to be undervalued.
The current stock price of ฿0.16 is trading 62.8% below its estimated GF Value™ of ฿0.43.
GuruFocus considers Prosper Engineering PCL to be Possible Value Trap.
Key valuation signals for BKK:PROS:
Graham Number: ฿N/A
GF Value™: ฿0.43 vs. price of ฿0.16 (62.8% below fair value)
No single metric tells the full story. See the BKK:PROS stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.
Prosper Engineering PCL is a provider of electrical and communication systems, air conditioning and ventilation systems, sanitary and fire protection system distribution of materials for M&E systems and maintenance services after completion of installation and architectural works. It operates and installs engineering systems in various types of buildings, shopping centers, large superstores, product distribution centers, mobile telephone network centers, information centers, residential buildings, office buildings, government and public sector buildings, hospitals, and industrial factories. The company has two segments: M&E engineering Segment and Civil & Structure Engineering Segment. It derives maximum revenue from M&E engineering Segment.
28GF Score
Get the complete analysis for BKK:PROS
Graham Number is just one metric. See GF Value™, 30-year financials, guru trades, warning signs, and more.
Quick Browse
Personalize
Premium Gurus 
Create New Portfolio
BKK:PROS has been successfully added to your 
