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Power ProbeLSE:PWR 27 Graham Number is £0.41 as of Dec. 2025, which is 100% below its 10-year median of 1.79. GuruFocus rates LSE:PWR with a GF Score™ of 27/100. Among 986 Vehicles & Parts companies, Power Probe ranks worse than 63.29% 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 (2026-08-13), the stock price of Power Probe is £0.665. Power Probe's graham number for the quarter that ended in Dec. 2025 was £0.41. Therefore, Power Probe's Price to Graham Number ratio for today is 1.62.
The historical rank and industry rank for Power Probe's Graham Number or its related term are showing as below:
LSE:PWR'
s Price-to-Graham-Number Range Over the Past 10 Years
Min: 1.2 Med: 1.79 Max: 1.79
Current: 1.62
During the past 4 years, the highest Price to Graham Number ratio of Power Probe was 1.79. The lowest was 1.20. And the median was 1.79.
LSE:PWR's Price-to-Graham-Number is ranked worse than 63.29% of 986
companies
in the Vehicles & Parts industry
Industry Median: 1.17
vs LSE:PWR: 1.62
Graham Number is a combination of asset valuation and earnings power valuation. It is a very conservative way of valuing a stock.
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.
Power Probe's Price to Graham number Ratio for today is calculated as
Price to Graham number
=
Share Price (Today)
/
Graham number (Q: Dec. 2025 )
=
0.665
/
0.41
=
1.62
* 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.
Power Probe Graham Number Related Terms
Power Probe Graham Number Historical Data
* Premium members only.
The historical data trend for Power Probe'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.
LSE:PWR vs ORLY, AZO, GPC: Graham Number Comparison
For the Auto Parts subindustry, Power Probe'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.
Power Probe Price-to-Graham-Number vs Vehicles & Parts Industry
For the Vehicles & Parts industry and Consumer Cyclical sector, Power Probe's Price-to-Graham-Number distribution charts can be found below:
* The bar in red indicates where Power Probe'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.
Power Probe (LSE:PWR) has a Graham Number of £0.41 as of Dec. 2025. The Graham Number values a company based on its per-share earnings and book value. View historical data on Power Probe and its competitors. This is 77% below median its historical median of 1.79. Over the past decade, Power Probe's Graham Number has ranged from 1.20 to 1.79. According to the industry distribution chart, Power Probe ranks #624 out of 986 companies in the Vehicles & Parts industry, placing it in the top 63.3%.
Is Power Probe's Graham Number too high?
Power Probe's current Graham Number of £0.41 is 77% below median its 10-year median of 1.79. Over the past 10 years, this metric has ranged from a low of 1.20 to a high of 1.79. Based on the distribution chart, Power Probe ranks #624 out of 986 companies in the Vehicles & Parts industry, which is below the industry midpoint. Overall, Power Probe has a GF Score™ of 27/100, reflecting its overall financial health beyond just this single metric.
How does Power Probe's Graham Number compare to ORLY and AZO?
According to the Vehicles & Parts industry distribution chart, Power Probe ranks #624 out of 986 companies for Graham Number. This places Power Probe in the lower half of its industry. The industry median Graham Number is 1.17. Historically, Power Probe's own Graham Number has ranged from 1.20 to 1.79 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 Vehicles & Parts company?
The median Graham Number among Vehicles & Parts companies is 1.17, based on 986 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 Power Probe and its competitors. For the Vehicles & Parts industry, the median Graham Number is 1.17 — values significantly above this may indicate overvaluation, while values below may suggest a bargain or underlying issues. Power Probe's current Graham Number is £0.41, which is 77% below median its own 10-year median of 1.79. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is Power Probe stock overvalued right now?
Power Probe (LSE:PWR) has a current Graham Number of £0.41. The current Graham Number is £0.41, which is 77% below median its 10-year median of 1.79. Power Probe's overall GF Score™ is 27/100. 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 Power Probe (LSE:PWR), the current Graham Number is £0.41 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.
Power Probe PLC is a producer of automotive electrical diagnostic tools for professional service technicians. The company offers a suite of electrical diagnostic tools and accessories designed to work with a range of vehicle engine types and manufacturers. These tools can be used in various commercial and passenger road vehicles, including light and heavy goods vehicles and motorcycles. geographically, the company operates in two segments USA and Rest of the world generating majority from the USA regions.
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