Ruby TechROCO:8048 -3.63%80 Operating Margin % is 17.87% as of Dec. 2025, which is 30% above its 10-year median of 13.71. GuruFocus rates ROCO:8048 with a GF Score™ of 80/100 and a GF Value™ of NT$41.75 (Significantly Overvalued). The stock has 7 warning signs investors should review. Among 2,472 Hardware companies, Ruby Tech ranks better than 87.74% on this metric.
Operating Margin % is calculated as Operating Income divided by its Revenue. Ruby Tech's Operating Income for the
three
months ended in Dec. 2025 was NT$52 Mil. Ruby Tech's Revenue for the
three
months ended in Dec. 2025 was NT$289 Mil. Therefore, Ruby Tech's Operating Margin % for the quarter that ended in Dec. 2025 was 17.87%.
Good Sign:
Ruby Tech Corp operating margin is expanding. Margin expansion is usually a good sign.
The historical rank and industry rank for Ruby Tech's Operating Margin % or its related term are showing as below:
ROCO:8048'
s Operating Margin % Range Over the Past 10 Years
Min: 10.97 Med: 13.71 Max: 16.53
Current: 16.08
ROCO:8048's Operating Margin % is ranked better than 87.74% of 2472
companies
in the Hardware industry
Industry Median: 3.81
vs ROCO:8048: 16.08
Ruby Tech's 5-Year Average Operating Margin % Growth Rate was 7.70% per year.
Ruby Tech's Operating Income for the
three
months ended in Dec. 2025 was NT$52 Mil.
Its Operating Income for the trailing twelve months (TTM) ended in Dec. 2025 was NT$163 Mil.
Just like Gross Margin %, it is important to see a company maintains its operating margin over time. Among the same industry, a company with higher operating margin is more efficient in its operation. It is also more stable during industry slowdown or recessions. Peter Lynch prefers those with higher margins than those with lower margins.
Be Aware
Operating Margin % can be manipulated by adjusting the rate of depreciation, depletion and amortization (DDA).
If a company is facing competition, its Operating Margin % may decline. Often the Operating Margin % declines well before the company's Revenue or even profit decline. Therefore, Operating Margin % is a very important indicator of whether the company is facing problems.
For instance, by 2012, Nokia (NOK)'s problems were well known and its stock had lost more than 90% of its market value since 2007. But Nokias Operating Margin % had already been in decline since 2002, although its Earnings per Share (Diluted) were still rising. Investors who paid attention to Operating Margin % would have avoided this huge loss. The same can be said for Research-in-Motion (RIMM).
Therefore, Operating Margin % is a very important screening filter for GuruFocus. GuruFocus's Buffett-Munger screener requires that the profit margin is either consistent or expanding. The Model Portfolio of the Buffett-Munger screener has outperformed the market every year since inception in 2009.
Ruby Tech Operating Margin % Related Terms
Ruby Tech Operating Margin % Historical Data
* Premium members only.
The historical data trend for Ruby Tech's Operating Margin % 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: Operating Margin % Comparison
For the Communication Equipment subindustry, Ruby Tech's Operating Margin %, along with its competitors' market caps and Operating Margin % 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 Operating Margin % vs Hardware Industry
For the Hardware industry and Technology sector, Ruby Tech's Operating Margin % distribution charts can be found below:
* The bar in red indicates where Ruby Tech's Operating Margin % falls into.
Operating Margin % - also known as operating income margin, operating profit margin and return on sales (ROS) - is the ratio of Operating Income divided by net sales or Revenue, usually presented in percent.
Ruby Tech's Operating Margin % for the fiscal year that ended in Dec. 2025 is calculated as
* 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.
Ruby Tech (ROCO:8048) has a Operating Margin % of 17.87% as of Dec. 2025. Operating margin is the ratio of total operating income to net sales. View historical data on Ruby Tech and its competitors. This is 30% above median its historical median of 13.71. Over the past decade, Ruby Tech's Operating Margin % has ranged from 10.97 to 16.53. According to the industry distribution chart, Ruby Tech ranks #303 out of 2472 companies in the Hardware industry, placing it in the top 12.3%.
Is Ruby Tech's Operating Margin % too high?
Ruby Tech's current Operating Margin % of 17.87% is 30% above median its 10-year median of 13.71. Over the past 10 years, this metric has ranged from a low of 10.97 to a high of 16.53. The Hardware industry median Operating Margin % is 3.81. Ruby Tech's value of 17.87% is 369% above this industry median. Based on the distribution chart, Ruby Tech ranks #303 out of 2472 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 Operating Margin % compare to CSCO and CIEN?
According to the Hardware industry distribution chart, Ruby Tech ranks #303 out of 2472 companies for Operating Margin %. This places Ruby Tech in the top 12% of its industry — outperforming the majority of peers. The industry median Operating Margin % is 3.81. Ruby Tech's value of 17.87% is 369% above this benchmark. Historically, Ruby Tech's own Operating Margin % has ranged from 10.97 to 16.53 over the past decade. While the company's 10-year median is 13.71 vs. the industry median of 3.81, 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 Operating Margin % for a Hardware company?
The median Operating Margin % among Hardware companies is 3.81, based on 2,472 companies in the industry. Companies in the top quartile (top 25%) have a Operating Margin % significantly above this median, while those in the bottom quartile fall well below. However, Operating Margin % should not be evaluated in isolation — investors should consider it alongside profitability, growth, and financial strength metrics. Ruby Tech's current Operating Margin % of 17.87% is 369% 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 Operating Margin % mean?
A high Operating Margin % can signal that a stock is expensive relative to its fundamentals. Operating margin is the ratio of total operating income to net sales. View historical data on Ruby Tech and its competitors. For the Hardware industry, the median Operating Margin % is 3.81 — values significantly above this may indicate overvaluation, while values below may suggest a bargain or underlying issues. Ruby Tech's current Operating Margin % is 17.87%, which is 30% above median its own 10-year median of 13.71. 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$61.10 — trading 46.3% above its estimated fair value. The current Operating Margin % is 17.87%, which is 30% above median its 10-year median of 13.71 and 369% above the Hardware industry median of 3.81. Ruby Tech's overall GF Score™ is 80/100 with 7 warning signs to review. Investors should evaluate multiple metrics — including profitability, growth, and financial strength — before making a decision.
How is Operating Margin % calculated?
Operating Margin % is calculated from a company's financial statements. For Ruby Tech (ROCO:8048), the current Operating Margin % is 17.87% as of Dec. 2025. 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$61.10 is trading 46.3% above its estimated GF Value™ of NT$41.75.
GuruFocus considers Ruby Tech to be Significantly Overvalued.
Key valuation signals for ROCO:8048:
Operating Margin %: 17.87% (30% above median its 10-year median of 13.71)
GF Value™: NT$41.75 vs. price of NT$61.10 (46.3% above fair value)
Industry Position: 369% above the Hardware median (#303 of 2472)
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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