Petra DiamondsPDLMF 43 Piotroski F-Score is 4 as of Jun. 24, 2026, which is 20% below its 10-year median of 5.00. GuruFocus rates PDLMF with a GF Score™ of 43/100 and a GF Value™ of $1.03. The stock has 2 warning signs investors should review. Among 2,510 Metals & Mining companies, Petra Diamonds ranks better than 78.29% on this metric.
The zones of discrimination were as such:
Good or high score = 7, 8, 9
Bad or low score = 0, 1, 2, 3
Petra Diamonds has an F-score of 4 indicating the company's financial situation is typical for a stable company.
The historical rank and industry rank for Petra Diamonds's Piotroski F-Score or its related term are showing as below:
PDLMF'
s Piotroski F-Score Range Over the Past 10 Years
Min: 2 Med: 5 Max: 6
Current: 4
During the past 13 years, the highest Piotroski F-Score of Petra Diamonds was 6. The lowest was 2. And the median was 5.
Petra Diamonds (OTCPK:PDLMF) Piotroski F-Score Explanation
The developer of the system is Joseph D. Piotroski is relatively unknown accounting professor who shuns publicity and rarely gives interviews.
He graduated from the University of Illinois with a B.S. in accounting in 1989, received an M.B.A. from Indiana University in 1994. Five years later, in 1999, after earning a Ph.D. in accounting from the University of Michigan, he became an associate professor of accounting at the University of Chicago.
He wanted to see if he can develop a system (using a simple nine-point scoring system) that can increase the returns of a strategy of investing in low price to book (referred to in the paper as high book to market) value companies.
What he found was something that exceeded his most optimistic expectations.
Buying only those companies that scored highest (8 or 9) on his nine-point scale, or F-Score as he called it, over the 20 year period from 1976 to 1996 led to an average out-performance over the market of 13.4%.
Even more impressive were the results of a strategy of investing in the highest F-Score companies (8 or 9) and shorting companies with the lowest F-Score (0 or 1).
Over the same period from 1976 to 1996 (20 years) this strategy led to an average yearly return of 23%, substantially outperforming the average S&P 500 index return of 15.83% over the same period.
Petra Diamonds Piotroski F-Score Related Terms
Petra Diamonds Piotroski F-Score Historical Data
* Premium members only.
The historical data trend for Petra Diamonds's Piotroski F-Score 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 Other Precious Metals & Mining subindustry, Petra Diamonds's Piotroski F-Score, along with its competitors' market caps and Piotroski F-Score 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.
Petra Diamonds Piotroski F-Score vs Metals & Mining Industry
For the Metals & Mining industry and Basic Materials sector, Petra Diamonds's Piotroski F-Score distribution charts can be found below:
* The bar in red indicates where Petra Diamonds's Piotroski F-Score 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.
*Note: If the latest quarterly/semi-annual/annual total assets data is 0, then we will use previous quarterly/semi-annual/annual data for all the items in the balance sheet.
Profitability
Question 1. Return on Assets (ROA)
Net income before extraordinary items for the year divided by Total Assets at the beginning of the year.
Score 1 if positive, 0 if negative.
Petra Diamonds's current Net Income (TTM) was -86.0.
==> Negative ==> Score 0.
Question 2. Cash Flow Return on Assets (CFROA)
Net cash flow from operating activities (operating cash flow) divided by Total Assets at the beginning of the year.
Petra Diamonds's return on assets of this year was -0.11375661. Petra Diamonds's return on assets of last year was -0.10177515.
==> Last year is higher ==> Score 0.
Question 4. Quality of Earnings (Accrual)
Compare Cash flow return on assets (2) to return on assets (1)
Petra Diamonds's gearing of this year was 0.0030888. Petra Diamonds's gearing of last year was 0.33354154.
==> This year is lower or equal to last year. ==> Score 1.
Question 6. Change in Working Capital (Liquidity)
Compare this year's current ratio (current assets divided by current liabilities) to last year's current ratio.
Score 1 if this year's current ratio is higher, 0 if it's lower
Petra Diamonds's current ratio of this year was 0.29815303. Petra Diamonds's current ratio of last year was 1.02739726.
==> Last year's current ratio is higher ==> Score 0.
Question 7. Change in Shares in Issue
Compare the number of shares in issue this year, to the number in issue last year.
Score 0 if there is larger number of shares in issue this year, 1 otherwise.
Petra Diamonds's number of shares in issue this year was 205.584. Petra Diamonds's number of shares in issue last year was 205.584.
==> There is smaller number of shares in issue this year, or the same. ==> Score 1.
Efficiency
Question 8. Change in Gross Margin
Compare this year's gross margin (Gross Profit divided by sales) to last year's.
Score 1 if this year's gross margin is higher, 0 if it's lower.
Petra Diamonds's gross margin of this year was -0.23671498. Petra Diamonds's gross margin of last year was -0.01290323.
==> Last year's gross margin is higher ==> Score 0.
Question 9. Change in asset turnover
Compare this year's asset turnover (total sales for the year divided by total assets at the beginning of the year) to last year's asset turnover ratio.
Score 1 if this year's asset turnover ratio is higher, 0 if it's lower
Petra Diamonds's asset turnover of this year was 0.27380952. Petra Diamonds's asset turnover of last year was 0.36686391.
==> Last year's asset turnover is higher ==> Score 0.
Evaluation
Piotroski F-Score
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Good or high score = 7, 8, 9
Bad or low score = 0, 1, 2, 3
Petra Diamonds has an F-score of 4 indicating the company's financial situation is typical for a stable company.
Petra Diamonds (PDLMF) has a Piotroski F-Score of 4 as of Jun. 24, 2026. The Piotroski F-score grades a company's business operating strength from 0-9. View historical data on Petra Diamonds and its competitors. This is 20% below median its historical median of 5.00. Over the past decade, Petra Diamonds' Piotroski F-Score has ranged from 2.00 to 6.00. According to the industry distribution chart, Petra Diamonds ranks #545 out of 2510 companies in the Metals & Mining industry, placing it in the top 21.7%.
Is Petra Diamonds' Piotroski F-Score too high?
Petra Diamonds' current Piotroski F-Score of 4 is 20% below median its 10-year median of 5.00. Over the past 10 years, this metric has ranged from a low of 2.00 to a high of 6.00. The Metals & Mining industry median Piotroski F-Score is 3.00. Petra Diamonds' value of 4 is 33.3% above this industry median. Based on the distribution chart, Petra Diamonds ranks #545 out of 2510 companies in the Metals & Mining industry, which is in the top quartile — a strong position relative to peers. Overall, Petra Diamonds has a GF Score™ of 43/100, reflecting its overall financial health beyond just this single metric.
How does Petra Diamonds' Piotroski F-Score compare to HL?
According to the Metals & Mining industry distribution chart, Petra Diamonds ranks #545 out of 2510 companies for Piotroski F-Score. This places Petra Diamonds in the top 22% of its industry — outperforming the majority of peers. The industry median Piotroski F-Score is 3.00. Petra Diamonds' value of 4 is 33.3% above this benchmark. Historically, Petra Diamonds' own Piotroski F-Score has ranged from 2.00 to 6.00 over the past decade. While the company's 10-year median is 5.00 vs. the industry median of 3.00, Petra Diamonds has consistently been above 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 Piotroski F-Score for a Metals & Mining company?
The median Piotroski F-Score among Metals & Mining companies is 3.00, based on 2,510 companies in the industry. Companies in the top quartile (top 25%) have a Piotroski F-Score significantly above this median, while those in the bottom quartile fall well below. However, Piotroski F-Score should not be evaluated in isolation — investors should consider it alongside profitability, growth, and financial strength metrics. Petra Diamonds's current Piotroski F-Score of 4 is 33.3% above 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 Piotroski F-Score mean?
A high Piotroski F-Score can signal that a stock is expensive relative to its fundamentals. The Piotroski F-score grades a company's business operating strength from 0-9. View historical data on Petra Diamonds and its competitors. For the Metals & Mining industry, the median Piotroski F-Score is 3.00 — values significantly above this may indicate overvaluation, while values below may suggest a bargain or underlying issues. Petra Diamonds's current Piotroski F-Score is 4, which is 20% below median its own 10-year median of 5.00. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is Petra Diamonds stock overvalued right now?
Petra Diamonds (PDLMF) has a current Piotroski F-Score of 4. The stock's GF Value™ is $1.03, compared to a current price of $0.27 — trading 73.9% below its estimated fair value. The current Piotroski F-Score is 4, which is 20% below median its 10-year median of 5.00 and 33.3% above the Metals & Mining industry median of 3.00. Petra Diamonds' overall GF Score™ is 43/100 with 2 warning signs to review. Investors should evaluate multiple metrics — including profitability, growth, and financial strength — before making a decision.
How is Piotroski F-Score calculated?
Piotroski F-Score is calculated from a company's financial statements. For Petra Diamonds (PDLMF), the current Piotroski F-Score is 4 as of Jun. 24, 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 Petra Diamonds (PDLMF) Overvalued in 2026?
Based on GuruFocus' analysis, Petra Diamonds stock appears to be undervalued.
The current stock price of $0.27 is trading 73.9% below its estimated GF Value™ of $1.03.
Key valuation signals for PDLMF:
Piotroski F-Score: 4 (20% below median its 10-year median of 5.00)
GF Value™: $1.03 vs. price of $0.27 (73.9% below fair value)
Industry Position: 33.3% above the Metals & Mining median (#545 of 2510)
No single metric tells the full story. See the PDLMF stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.
Petra Diamonds Ltd is an independent diamond mining company. It focuses on the upstream segment of the diamond pipeline, which includes mining, processing, sorting, and selling rough diamonds. It operates in Southern Africa, with mines such as Cullinan and Finsch producing high-quality white and rare blue diamonds. Its operating and geographical segments are: a) Mining: The extraction and sale of rough diamonds from mining operations in South Africa and Tanzania, b) Corporate: Administrative activities in the United Kingdom, c) Beneficiation: Beneficiation activities in South Africa. The majority of revenue is generated from the sale of rough diamonds.
43GF Score
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