Corero Network SecurityDDOSF 53 Piotroski F-Score is 3 as of Jun. 24, 2026, which is 40% below its 10-year median of 5.00. GuruFocus rates DDOSF with a GF Score™ of 53/100 and a GF Value™ of $0.18 (Fairly Valued). The stock has 4 warning signs investors should review. Among 2,739 Software companies, Corero Network Security ranks worse than 78.9% on this metric.
Warning Sign:
Piotroski F-Score of 3 is low, which usually implies poor business operation.
The zones of discrimination were as such:
Good or high score = 7, 8, 9
Bad or low score = 0, 1, 2, 3
Corero Network Security has an F-score of 3. It is a bad or low score, which usually implies poor business operation.
The historical rank and industry rank for Corero Network Security's Piotroski F-Score or its related term are showing as below:
DDOSF'
s Piotroski F-Score Range Over the Past 10 Years
Min: 3 Med: 5 Max: 7
Current: 3
During the past 13 years, the highest Piotroski F-Score of Corero Network Security was 7. The lowest was 3. And the median was 5.
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.
Corero Network Security Piotroski F-Score Related Terms
Corero Network Security Piotroski F-Score Historical Data
* Premium members only.
The historical data trend for Corero Network Security'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.
DDOSF vs MSFT, ORCL, PLTR: Piotroski F-Score Comparison
For the Software - Infrastructure subindustry, Corero Network Security'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.
Corero Network Security Piotroski F-Score vs Software Industry
For the Software industry and Technology sector, Corero Network Security's Piotroski F-Score distribution charts can be found below:
* The bar in red indicates where Corero Network Security'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.
Corero Network Security's current Net Income (TTM) was -0.71.
==> 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.
Score 1 if positive, 0 if negative.
Corero Network Security's current Cash Flow from Operations (TTM) was 2.99.
==> 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.
Corero Network Security's return on assets of this year was -0.02122642. Corero Network Security's return on assets of last year was 0.01751301.
==> Last year is higher ==> Score 0.
Question 4. Quality of Earnings (Accrual)
Compare Cash flow return on assets (2) to return on assets (1)
Corero Network Security's gearing of this year was 0.01027139. Corero Network Security's gearing of last year was 0.00155009.
==> 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
Corero Network Security's current ratio of this year was 1.12637185. Corero Network Security's current ratio of last year was 1.50402548.
==> 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.
Corero Network Security's number of shares in issue this year was 512.165. Corero Network Security's number of shares in issue last year was 565.479.
==> 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.
Corero Network Security's gross margin of this year was 0.90129025. Corero Network Security's gross margin of last year was 0.91310721.
==> 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
Corero Network Security's asset turnover of this year was 0.76125508. Corero Network Security's asset turnover of last year was 0.86365874.
==> 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
Corero Network Security has an F-score of 3. It is a bad or low score, which usually implies poor business operation.
Corero Network Security (DDOSF) has a Piotroski F-Score of 3 as of Jun. 24, 2026. The Piotroski F-score grades a company's business operating strength from 0-9. View historical data on Corero Network Security and its competitors. This is 40% below median its historical median of 5.00. Over the past decade, Corero Network Security's Piotroski F-Score has ranged from 3.00 to 7.00. According to the industry distribution chart, Corero Network Security ranks #2161 out of 2739 companies in the Software industry, placing it in the top 78.9%.
Is Corero Network Security's Piotroski F-Score too high?
Corero Network Security's current Piotroski F-Score of 3 is 40% below median its 10-year median of 5.00. Over the past 10 years, this metric has ranged from a low of 3.00 to a high of 7.00. The Software industry median Piotroski F-Score is 5.00. Corero Network Security's value of 3 is 40% below this industry median. Based on the distribution chart, Corero Network Security ranks #2161 out of 2739 companies in the Software industry, which is in the bottom quartile relative to peers. Overall, Corero Network Security has a GF Score™ of 53/100 and is considered Fairly Valued, reflecting its overall financial health beyond just this single metric.
How does Corero Network Security's Piotroski F-Score compare to MSFT and ORCL?
According to the Software industry distribution chart, Corero Network Security ranks #2161 out of 2739 companies for Piotroski F-Score. This places Corero Network Security in the lower half of its industry. The industry median Piotroski F-Score is 5.00. Corero Network Security's value of 3 is 40% below this benchmark. Historically, Corero Network Security's own Piotroski F-Score has ranged from 3.00 to 7.00 over the past decade. While the company's 10-year median is 5.00 vs. the industry median of 5.00, Corero Network Security 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 Software company?
The median Piotroski F-Score among Software companies is 5.00, based on 2,739 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. Corero Network Security's current Piotroski F-Score of 3 is 40% 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 Corero Network Security and its competitors. For the Software industry, the median Piotroski F-Score is 5.00 — values significantly above this may indicate overvaluation, while values below may suggest a bargain or underlying issues. Corero Network Security's current Piotroski F-Score is 3, which is 40% 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 Corero Network Security stock overvalued right now?
Based on GuruFocus' analysis, Corero Network Security (DDOSF) is currently considered Fairly Valued. The stock's GF Value™ is $0.18, compared to a current price of $0.17 — trading 8.1% below its estimated fair value. The current Piotroski F-Score is 3, which is 40% below median its 10-year median of 5.00 and 40% below the Software industry median of 5.00. Corero Network Security's overall GF Score™ is 53/100 with 4 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 Corero Network Security (DDOSF), the current Piotroski F-Score is 3 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 Corero Network Security (DDOSF) Overvalued in 2026?
Based on GuruFocus' analysis, Corero Network Security stock appears to be undervalued.
The current stock price of $0.17 is trading 8.1% below its estimated GF Value™ of $0.18.
GuruFocus considers Corero Network Security to be Fairly Valued.
Key valuation signals for DDOSF:
Piotroski F-Score: 3 (40% below median its 10-year median of 5.00)
GF Value™: $0.18 vs. price of $0.17 (8.1% below fair value)
Industry Position: 40% below the Software median (#2161 of 2739)
No single metric tells the full story. See the DDOSF stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.
Corero Network Security PLC is a network security solutions provider. The company offers Distributed Denial of Service (DDoS) defense solutions for service providers, hosting providers and data centers, managed security service providers, and online enterprises. The company's key products are SmartWall Network Threat Defense System, Datapath protection, SecureWatch Analytics, Scrubbing protection, Edge mitigation, and Cloud mitigation. Geographically, it derives a majority of its revenue from the USA.
53GF Score
Get the complete analysis for DDOSF
Piotroski F-Score is just one metric. See GF Value™, 30-year financials, guru trades, warning signs, and more.
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