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PolynovoCALZF 74 Graham Number is $0.15 as of Dec. 2025, which is 99% below its 10-year median of 13.60. GuruFocus rates CALZF with a GF Score™ of 74/100 and a GF Value™ of $2.24 (Significantly Undervalued). The stock has 4 warning signs investors should review. Among 401 Medical Devices & Instruments companies, Polynovo ranks worse than 87.28% 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 (2026-07-22), the stock price of Polynovo is $0.7102. Polynovo's graham number for the quarter that ended in Dec. 2025 was $0.15. Therefore, Polynovo's Price to Graham Number ratio for today is 4.86.
The historical rank and industry rank for Polynovo's Graham Number or its related term are showing as below:
CALZF'
s Price-to-Graham-Number Range Over the Past 10 Years
Min: 4.45 Med: 13.6 Max: 20.69
Current: 4.73
During the past 13 years, the highest Price to Graham Number ratio of Polynovo was 20.69. The lowest was 4.45. And the median was 13.60.
CALZF's Price-to-Graham-Number is ranked worse than 87.28% of 401
companies
in the Medical Devices & Instruments industry
Industry Median: 1.71
vs CALZF: 4.73
Graham Number is a combination of asset valuation and earnings power valuation. It is a very conservative way of valuing a stock.
Polynovo (OTCPK:CALZF) 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.
Polynovo's Price to Graham number Ratio for today is calculated as
Price to Graham number
=
Share Price (Today)
/
Graham number (Q: Dec. 2025 )
=
0.7102
/
0.15
=
4.86
* 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.
Polynovo Graham Number Related Terms
Polynovo Graham Number Historical Data
* Premium members only.
The historical data trend for Polynovo'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.
For the Medical Devices subindustry, Polynovo'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.
Polynovo Price-to-Graham-Number vs Medical Devices & Instruments Industry
For the Medical Devices & Instruments industry and Healthcare sector, Polynovo's Price-to-Graham-Number distribution charts can be found below:
* The bar in red indicates where Polynovo'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.
Polynovo (CALZF) has a Graham Number of $0.15 as of Dec. 2025. The Graham Number values a company based on its per-share earnings and book value. View historical data on Polynovo and its competitors. This is 99% below median its historical median of 13.60. Over the past decade, Polynovo's Graham Number has ranged from 4.45 to 20.69. According to the industry distribution chart, Polynovo ranks #350 out of 401 companies in the Medical Devices & Instruments industry, placing it in the top 87.3%.
Is Polynovo's Graham Number too high?
Polynovo's current Graham Number of $0.15 is 99% below median its 10-year median of 13.60. Over the past 10 years, this metric has ranged from a low of 4.45 to a high of 20.69. The Medical Devices & Instruments industry median Graham Number is 1.71. Polynovo's value of $0.15 is 91.2% below this industry median. Based on the distribution chart, Polynovo ranks #350 out of 401 companies in the Medical Devices & Instruments industry, which is in the bottom quartile relative to peers. Overall, Polynovo has a GF Score™ of 74/100 and is considered Significantly Undervalued, reflecting its overall financial health beyond just this single metric.
How does Polynovo's Graham Number compare to ABT and SYK?
According to the Medical Devices & Instruments industry distribution chart, Polynovo ranks #350 out of 401 companies for Graham Number. This places Polynovo in the lower half of its industry. The industry median Graham Number is 1.71. Polynovo's value of $0.15 is 91.2% below this benchmark. Historically, Polynovo's own Graham Number has ranged from 4.45 to 20.69 over the past decade. While the company's 10-year median is 13.60 vs. the industry median of 1.71, Polynovo has consistently been below the industry average. 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 Medical Devices & Instruments company?
The median Graham Number among Medical Devices & Instruments companies is 1.71, based on 401 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. Polynovo's current Graham Number of $0.15 is 91.2% below the industry median. 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 Polynovo and its competitors. For the Medical Devices & Instruments industry, the median Graham Number is 1.71 — values significantly above this may indicate overvaluation, while values below may suggest a bargain or underlying issues. Polynovo's current Graham Number is $0.15, which is 99% below median its own 10-year median of 13.60. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is Polynovo stock overvalued right now?
Based on GuruFocus' analysis, Polynovo (CALZF) is currently considered Significantly Undervalued. The stock's GF Value™ is $2.24, compared to a current price of $0.71 — trading 68.3% below its estimated fair value. The current Graham Number is $0.15, which is 99% below median its 10-year median of 13.60 and 91.2% below the Medical Devices & Instruments industry median of 1.71. Polynovo's overall GF Score™ is 74/100 with 4 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 Polynovo (CALZF), the current Graham Number is $0.15 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.
Is Polynovo (CALZF) Overvalued in 2026?
Based on GuruFocus' analysis, Polynovo stock appears to be undervalued.
The current stock price of $0.71 is trading 68.3% below its estimated GF Value™ of $2.24.
GuruFocus considers Polynovo to be Significantly Undervalued.
Key valuation signals for CALZF:
Graham Number: $0.15 (99% below median its 10-year median of 13.60)
GF Value™: $2.24 vs. price of $0.71 (68.3% below fair value)
Industry Position: 91.2% below the Medical Devices & Instruments median (#350 of 401)
No single metric tells the full story. See the CALZF stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.
Polynovo earns most of its revenue from US sales of its NovoSorb Biodegradable Temporizing Matrix, or NovoSorb BTM. The product is a patented biodegradable synthetic scaffold to support the regeneration of the dermis when lost through surgery, trauma, burns, or other causes of tissue loss. Once the product is applied to a wound, it takes a few weeks for the dermal layer to fully integrate within the polymer scaffold before a clinician can delaminate the outer layer. A small wound would then close either naturally or with a dressing, while a larger wound would close through a split-skin graft or alternative product such as Avita's RECELL. NovoSorb BTM then slowly degrades to harmless byproducts which are fully absorbed in roughly 18 months.
74GF Score
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