Ruby TechROCO:8048 +1.31%80 Piotroski F-Score is 7 as of Jun. 29, 2026, which is 17% above its 10-year median of 6.00. GuruFocus rates ROCO:8048 with a GF Score™ of 80/100 and a GF Value™ of NT$41.75 (Significantly Overvalued). The stock has 5 warning signs investors should review. Among 2,432 Hardware companies, Ruby Tech ranks better than 91.12% on this metric.
Good Sign:
Piotroski F-Score is 7, indicates a very healthy situation.
The zones of discrimination were as such:
Good or high score = 7, 8, 9
Bad or low score = 0, 1, 2, 3
Ruby Tech has an F-score of 7. It is a good or high score, which usually indicates a very healthy situation.
The historical rank and industry rank for Ruby Tech's Piotroski F-Score or its related term are showing as below:
ROCO:8048'
s Piotroski F-Score Range Over the Past 10 Years
Min: 4 Med: 6 Max: 7
Current: 7
During the past 13 years, the highest Piotroski F-Score of Ruby Tech was 7. The lowest was 4. And the median was 6.
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.
Ruby Tech Piotroski F-Score Related Terms
Ruby Tech Piotroski F-Score Historical Data
* Premium members only.
The historical data trend for Ruby Tech'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.
ROCO:8048 vs CSCO, CIEN, MSI: Piotroski F-Score Comparison
For the Communication Equipment subindustry, Ruby Tech'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.
Ruby Tech Piotroski F-Score vs Hardware Industry
For the Hardware industry and Technology sector, Ruby Tech's Piotroski F-Score distribution charts can be found below:
* The bar in red indicates where Ruby Tech'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.
Ruby Tech's current Net Income (TTM) was 154.
==> 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.
Ruby Tech's return on assets of this year was 0.11065665. Ruby Tech's return on assets of last year was 0.0818373.
==> This year is higher. ==> Score 1.
Question 4. Quality of Earnings (Accrual)
Compare Cash flow return on assets (2) to return on assets (1)
Ruby Tech's current ratio of this year was 4.20865548. Ruby Tech's current ratio of last year was 4.59372815.
==> 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.
Ruby Tech's number of shares in issue this year was 58.353. Ruby Tech's number of shares in issue last year was 58.47.
==> 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.
Ruby Tech's gross margin of this year was 0.34666467. Ruby Tech's gross margin of last year was 0.31426838.
==> 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
Ruby Tech's asset turnover of this year was 0.72687788. Ruby Tech's asset turnover of last year was 0.61101872.
==> This year's asset turnover is higher. ==> Score 1.
Evaluation
Piotroski F-Score
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7
Good or high score = 7, 8, 9
Bad or low score = 0, 1, 2, 3
Ruby Tech has an F-score of 7. It is a good or high score, which usually indicates a very healthy situation.
Ruby Tech (ROCO:8048) has a Piotroski F-Score of 7 as of Jun. 29, 2026. The Piotroski F-score grades a company's business operating strength from 0-9. View historical data on Ruby Tech and its competitors. This is 17% above median its historical median of 6.00. Over the past decade, Ruby Tech's Piotroski F-Score has ranged from 4.00 to 7.00. According to the industry distribution chart, Ruby Tech ranks #216 out of 2432 companies in the Hardware industry, placing it in the top 8.9%.
Is Ruby Tech's Piotroski F-Score too high?
Ruby Tech's current Piotroski F-Score of 7 is 17% above 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 7.00. The Hardware industry median Piotroski F-Score is 5.00. Ruby Tech's value of 7 is 40% above this industry median. Based on the distribution chart, Ruby Tech ranks #216 out of 2432 companies in the Hardware industry, which is in the top quartile — a strong position relative to peers. Overall, Ruby Tech has a GF Score™ of 80/100 and is considered Significantly Overvalued, reflecting its overall financial health beyond just this single metric.
How does Ruby Tech's Piotroski F-Score compare to CSCO and CIEN?
According to the Hardware industry distribution chart, Ruby Tech ranks #216 out of 2432 companies for Piotroski F-Score. This places Ruby Tech in the top 9% of its industry — outperforming the majority of peers. The industry median Piotroski F-Score is 5.00. Ruby Tech's value of 7 is 40% above this benchmark. Historically, Ruby Tech's own Piotroski F-Score has ranged from 4.00 to 7.00 over the past decade. While the company's 10-year median is 6.00 vs. the industry median of 5.00, Ruby Tech 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 Hardware company?
The median Piotroski F-Score among Hardware companies is 5.00, based on 2,432 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. Ruby Tech's current Piotroski F-Score of 7 is 40% 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 Ruby Tech and its competitors. For the Hardware 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. Ruby Tech's current Piotroski F-Score is 7, which is 17% above 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 Ruby Tech stock overvalued right now?
Based on GuruFocus' analysis, Ruby Tech (ROCO:8048) is currently considered Significantly Overvalued. The stock's GF Value™ is NT$41.75, compared to a current price of NT$61.90 — trading 48.3% above its estimated fair value. The current Piotroski F-Score is 7, which is 17% above median its 10-year median of 6.00 and 40% above the Hardware industry median of 5.00. Ruby Tech's overall GF Score™ is 80/100 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 Ruby Tech (ROCO:8048), the current Piotroski F-Score is 7 as of Jun. 29, 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 Ruby Tech (ROCO:8048) Overvalued in 2026?
Based on GuruFocus' analysis, Ruby Tech stock appears to be overvalued.
The current stock price of NT$61.90 is trading 48.3% above its estimated GF Value™ of NT$41.75.
GuruFocus considers Ruby Tech to be Significantly Overvalued.
Key valuation signals for ROCO:8048:
Piotroski F-Score: 7 (17% above median its 10-year median of 6.00)
GF Value™: NT$41.75 vs. price of NT$61.90 (48.3% above fair value)
Industry Position: 40% above the Hardware median (#216 of 2432)
No single metric tells the full story. See the ROCO:8048 stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.
Ruby Tech Corp is engaged in the research, manufacturing, and trading of optical fiber network equipment for central offices and customer premises, network management switches, and outdoor wireless networking equipment. It is focused on OEM/ODM Business of Networking Products such as PoE Ethernet Switches, Industrial Switches, GEPON OLT/ONU, etc. The reportable segments of the company are: i) Computer and its peripheral equipment: Department 1, and ii) Computer and its peripheral equipment: Department 2. The majority of revenue is derived from Department 1.
80GF Score
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Piotroski F-Score is just one metric. See GF Value™, 30-year financials, guru trades, warning signs, and more.
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