China Nonferrous MiningSTU:3N4 -5.43%58 Piotroski F-Score is 5 as of Jul. 01, 2026, which is 29% below its 10-year median of 7.00. GuruFocus rates STU:3N4 with a GF Score™ of 58/100 and a GF Value™ of €0.52 (Significantly Overvalued). The stock has 1 warning sign investors should review. Among 2,506 Metals & Mining companies, China Nonferrous Mining ranks better than 85.91% 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
China Nonferrous Mining has an F-score of 5 indicating the company's financial situation is typical for a stable company.
The historical rank and industry rank for China Nonferrous Mining's Piotroski F-Score or its related term are showing as below:
STU:3N4'
s Piotroski F-Score Range Over the Past 10 Years
Min: 4 Med: 7 Max: 8
Current: 5
During the past 13 years, the highest Piotroski F-Score of China Nonferrous Mining was 8. The lowest was 4. And the median was 7.
China Nonferrous Mining (STU:3N4) 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.
China Nonferrous Mining Piotroski F-Score Related Terms
China Nonferrous Mining Piotroski F-Score Historical Data
* Premium members only.
The historical data trend for China Nonferrous Mining'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.
STU:3N4 vs SCCO, FCX: Piotroski F-Score Comparison
For the Copper subindustry, China Nonferrous Mining'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.
China Nonferrous Mining Piotroski F-Score vs Metals & Mining Industry
For the Metals & Mining industry and Basic Materials sector, China Nonferrous Mining's Piotroski F-Score distribution charts can be found below:
* The bar in red indicates where China Nonferrous Mining'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.
China Nonferrous Mining's current Net Income (TTM) was 345.
==> Positive ==> Score 1.
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.
Score 1 if positive, 0 if negative.
China Nonferrous Mining's current Cash Flow from Operations (TTM) was 802.
==> Positive ==> Score 1.
Question 3. Change in Return on Assets
Compare this year's return on assets (1) to last year's return on assets.
China Nonferrous Mining's return on assets of this year was 0.0870285. China Nonferrous Mining's return on assets of last year was 0.10865632.
==> Last year is higher ==> Score 0.
Question 4. Quality of Earnings (Accrual)
Compare Cash flow return on assets (2) to return on assets (1)
China Nonferrous Mining's gearing of this year was 0.01204395. China Nonferrous Mining's gearing of last year was 0.00641262.
==> Last year is lower than this year ==> Score 0.
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
China Nonferrous Mining's current ratio of this year was 2.78411925. China Nonferrous Mining's current ratio of last year was 2.75615414.
==> This year's current ratio is higher. ==> Score 1.
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.
China Nonferrous Mining's number of shares in issue this year was 3902.036. China Nonferrous Mining's number of shares in issue last year was 3855.274.
==> There is larger number of shares in issue this year. ==> Score 0.
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.
China Nonferrous Mining's gross margin of this year was 0.31067815. China Nonferrous Mining's gross margin of last year was 0.27489957.
==> This year's gross margin is higher. ==> Score 1.
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
China Nonferrous Mining's asset turnover of this year was 0.73617144. China Nonferrous Mining's asset turnover of last year was 1.0406105.
==> 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
China Nonferrous Mining has an F-score of 5 indicating the company's financial situation is typical for a stable company.
China Nonferrous Mining (STU:3N4) has a Piotroski F-Score of 5 as of Jul. 01, 2026. The Piotroski F-score grades a company's business operating strength from 0-9. View historical data on China Nonferrous Mining and its competitors. This is 29% below median its historical median of 7.00. Over the past decade, China Nonferrous Mining's Piotroski F-Score has ranged from 4.00 to 8.00. According to the industry distribution chart, China Nonferrous Mining ranks #353 out of 2506 companies in the Metals & Mining industry, placing it in the top 14.1%.
Is China Nonferrous Mining's Piotroski F-Score too high?
China Nonferrous Mining's current Piotroski F-Score of 5 is 29% below median its 10-year median of 7.00. Over the past 10 years, this metric has ranged from a low of 4.00 to a high of 8.00. The Metals & Mining industry median Piotroski F-Score is 3.00. China Nonferrous Mining's value of 5 is 66.7% above this industry median. Based on the distribution chart, China Nonferrous Mining ranks #353 out of 2506 companies in the Metals & Mining industry, which is in the top quartile — a strong position relative to peers. Overall, China Nonferrous Mining has a GF Score™ of 58/100 and is considered Significantly Overvalued, reflecting its overall financial health beyond just this single metric.
How does China Nonferrous Mining's Piotroski F-Score compare to SCCO and FCX?
According to the Metals & Mining industry distribution chart, China Nonferrous Mining ranks #353 out of 2506 companies for Piotroski F-Score. This places China Nonferrous Mining in the top 14% of its industry — outperforming the majority of peers. The industry median Piotroski F-Score is 3.00. China Nonferrous Mining's value of 5 is 66.7% above this benchmark. Historically, China Nonferrous Mining's own Piotroski F-Score has ranged from 4.00 to 8.00 over the past decade. While the company's 10-year median is 7.00 vs. the industry median of 3.00, China Nonferrous Mining 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 2,506 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. China Nonferrous Mining's current Piotroski F-Score of 5 is 66.7% 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 China Nonferrous Mining 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. China Nonferrous Mining's current Piotroski F-Score is 5, which is 29% below median its own 10-year median of 7.00. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is China Nonferrous Mining stock overvalued right now?
Based on GuruFocus' analysis, China Nonferrous Mining (STU:3N4) is currently considered Significantly Overvalued. The stock's GF Value™ is €0.52, compared to a current price of €1.22 — trading 134.6% above its estimated fair value. The current Piotroski F-Score is 5, which is 29% below median its 10-year median of 7.00 and 66.7% above the Metals & Mining industry median of 3.00. China Nonferrous Mining's overall GF Score™ is 58/100 with 1 warning sign 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 China Nonferrous Mining (STU:3N4), the current Piotroski F-Score is 5 as of Jul. 01, 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 China Nonferrous Mining (STU:3N4) Overvalued in 2026?
Based on GuruFocus' analysis, China Nonferrous Mining stock appears to be overvalued.
The current stock price of €1.22 is trading 134.6% above its estimated GF Value™ of €0.52.
GuruFocus considers China Nonferrous Mining to be Significantly Overvalued.
Key valuation signals for STU:3N4:
Piotroski F-Score: 5 (29% below median its 10-year median of 7.00)
GF Value™: €0.52 vs. price of €1.22 (134.6% above fair value)
Industry Position: 66.7% above the Metals & Mining median (#353 of 2506)
No single metric tells the full story. See the STU:3N4 stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.
China Nonferrous Mining Corp Ltd is a Company with its subsidiaries are principally engaged in exploration, mining, ore processing, leaching, smelting of copper and cobalt, and sale of copper cathodes, blister copper and copper anodes, copper-cobalt alloy, cobaltous hydroxide and sulfuric acid. Its operating segments are Leaching and Smelting. The majority of the company's revenue is derived from the Smelting segment. The smelting segment includes the production and sale of blister and copper anodes. Geographically, it derives a majority of revenue from Mainland China.
58GF Score
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