Nos SgpsZONNF -14.16%61 Piotroski F-Score is 5 as of Jun. 24, 2026, which is 17% below its 10-year median of 6.00. GuruFocus rates ZONNF with a GF Score™ of 61/100 and a GF Value™ of $3.71 (Significantly Overvalued). The stock has 5 warning signs investors should review. Among 359 Telecommunication Services companies, Nos Sgps ranks worse than 51.53% 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
Nos Sgps 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 Nos Sgps's Piotroski F-Score or its related term are showing as below:
ZONNF'
s Piotroski F-Score Range Over the Past 10 Years
Min: 4 Med: 6 Max: 8
Current: 5
During the past 13 years, the highest Piotroski F-Score of Nos Sgps was 8. The lowest was 4. And the median was 6.
Nos Sgps (OTCPK:ZONNF) 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.
Nos Sgps Piotroski F-Score Related Terms
Nos Sgps Piotroski F-Score Historical Data
* Premium members only.
The historical data trend for Nos Sgps'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.
ZONNF vs TMUS, VZ, T: Piotroski F-Score Comparison
For the Telecom Services subindustry, Nos Sgps'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.
Nos Sgps Piotroski F-Score vs Telecommunication Services Industry
For the Telecommunication Services industry and Communication Services sector, Nos Sgps's Piotroski F-Score distribution charts can be found below:
* The bar in red indicates where Nos Sgps'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.
Nos Sgps's current Net Income (TTM) was 290.
==> 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.
Nos Sgps's gearing of this year was 0.33435459. Nos Sgps's gearing of last year was 0.41083793.
==> 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
Nos Sgps's current ratio of this year was 0.56098487. Nos Sgps's current ratio of last year was 0.68539983.
==> 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.
Nos Sgps's number of shares in issue this year was 512.013. Nos Sgps's number of shares in issue last year was 509.324.
==> 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.
Nos Sgps's gross margin of this year was 0.70406791. Nos Sgps's gross margin of last year was 0.71197178.
==> 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
Nos Sgps's asset turnover of this year was 0.56342601. Nos Sgps's asset turnover of last year was 0.4911469.
==> This year's asset turnover is higher. ==> Score 1.
Evaluation
Piotroski F-Score
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Good or high score = 7, 8, 9
Bad or low score = 0, 1, 2, 3
Nos Sgps has an F-score of 5 indicating the company's financial situation is typical for a stable company.
Nos Sgps (ZONNF) has a Piotroski F-Score of 5 as of Jun. 24, 2026. The Piotroski F-score grades a company's business operating strength from 0-9. View historical data on Nos Sgps and its competitors. This is 17% below median its historical median of 6.00. Over the past decade, Nos Sgps' Piotroski F-Score has ranged from 4.00 to 8.00. According to the industry distribution chart, Nos Sgps ranks #185 out of 359 companies in the Telecommunication Services industry, placing it in the top 51.5%.
Is Nos Sgps' Piotroski F-Score too high?
Nos Sgps' current Piotroski F-Score of 5 is 17% below median its 10-year median of 6.00. Over the past 10 years, this metric has ranged from a low of 4.00 to a high of 8.00. The Telecommunication Services industry median Piotroski F-Score is 6.00. Nos Sgps' value of 5 is 16.7% below this industry median. Based on the distribution chart, Nos Sgps ranks #185 out of 359 companies in the Telecommunication Services industry, which is below the industry midpoint. Overall, Nos Sgps has a GF Score™ of 61/100 and is considered Significantly Overvalued, reflecting its overall financial health beyond just this single metric.
How does Nos Sgps' Piotroski F-Score compare to TMUS and VZ?
According to the Telecommunication Services industry distribution chart, Nos Sgps ranks #185 out of 359 companies for Piotroski F-Score. This places Nos Sgps in the lower half of its industry. The industry median Piotroski F-Score is 6.00. Nos Sgps' value of 5 is 16.7% below this benchmark. Historically, Nos Sgps' own Piotroski F-Score has ranged from 4.00 to 8.00 over the past decade. While the company's 10-year median is 6.00 vs. the industry median of 6.00, Nos Sgps 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 Piotroski F-Score for a Telecommunication Services company?
The median Piotroski F-Score among Telecommunication Services companies is 6.00, based on 359 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. Nos Sgps's current Piotroski F-Score of 5 is 16.7% 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 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 Nos Sgps and its competitors. For the Telecommunication Services industry, the median Piotroski F-Score is 6.00 — values significantly above this may indicate overvaluation, while values below may suggest a bargain or underlying issues. Nos Sgps's current Piotroski F-Score is 5, which is 17% below median its own 10-year median of 6.00. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is Nos Sgps stock overvalued right now?
Based on GuruFocus' analysis, Nos Sgps (ZONNF) is currently considered Significantly Overvalued. The stock's GF Value™ is $3.71, compared to a current price of $6.00 — trading 61.7% above its estimated fair value. The current Piotroski F-Score is 5, which is 17% below median its 10-year median of 6.00 and 16.7% below the Telecommunication Services industry median of 6.00. Nos Sgps' overall GF Score™ is 61/100 with 5 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 Nos Sgps (ZONNF), the current Piotroski F-Score is 5 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 Nos Sgps (ZONNF) Overvalued in 2026?
Based on GuruFocus' analysis, Nos Sgps stock appears to be overvalued.
The current stock price of $6.00 is trading 61.7% above its estimated GF Value™ of $3.71.
GuruFocus considers Nos Sgps to be Significantly Overvalued.
Key valuation signals for ZONNF:
Piotroski F-Score: 5 (17% below median its 10-year median of 6.00)
GF Value™: $3.71 vs. price of $6.00 (61.7% above fair value)
Industry Position: 16.7% below the Telecommunication Services median (#185 of 359)
No single metric tells the full story. See the ZONNF stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.
Nos Sgps SA is a group operating in communications, technology, and entertainment in Portugal. It provides fixed and mobile telecommunications services, internet, voice and data solutions, as well as cinema and audiovisual services. Its operations span telecommunications, information technology, and related businesses, offering digital and connectivity services to customers in Portugal. The company's business segments are: Telco, IT and Audiovisuals & Cinema. The majority of the company's revenue is derived from the Telco segment, which includes TV, Internet (fixed and mobile) and voice (fixed and mobile) services rendered.
61GF Score
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