Focused on building reliable datasets, financial models, and research tools for value-minded investors. Committed to turning complex data into practical guidance for value-investing and long-term wealth.
Dr. Charlie Tian is the founder and CEO of GuruFocus.com, a leading global investment research platform established in 2004. With a Ph.D. in physics, Dr. Tian transitioned from science to finance, applying a data-driven, disciplined approach to value investing.
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.
M31 Technology Operating Margin % Related Terms
M31 Technology Operating Margin % Historical Data
* Premium members only.
The historical data trend for M31 Technology'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:6643 vs NVDA, AVGO, MU: Operating Margin % Comparison
For the Semiconductors subindustry, M31 Technology'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.
M31 Technology Operating Margin % vs Semiconductors Industry
For the Semiconductors industry and Technology sector, M31 Technology's Operating Margin % distribution charts can be found below:
* The bar in red indicates where M31 Technology'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.
M31 Technology'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.
M31 Technology (ROCO:6643) has a Operating Margin % of -14.58% as of Mar. 2026. Operating margin is the ratio of total operating income to net sales. View historical data on M31 Technology and its competitors. Over the past decade, M31 Technology's Operating Margin % has ranged from 1.64 to 42.81. According to the industry distribution chart, M31 Technology ranks #632 out of 1023 companies in the Semiconductors industry, placing it in the top 61.8%.
Is M31 Technology's Operating Margin % too high?
M31 Technology's current Operating Margin % is -14.58%. Over the past 10 years, this metric has ranged from a low of 1.64 to a high of 42.81. Based on the distribution chart, M31 Technology ranks #632 out of 1023 companies in the Semiconductors industry, which is below the industry midpoint. Overall, M31 Technology has a GF Score™ of 86/100 and is considered Significantly Undervalued, reflecting its overall financial health beyond just this single metric.
How does M31 Technology's Operating Margin % compare to NVDA and AVGO?
According to the Semiconductors industry distribution chart, M31 Technology ranks #632 out of 1023 companies for Operating Margin %. This places M31 Technology in the lower half of its industry. The industry median Operating Margin % is 5.63. Historically, M31 Technology's own Operating Margin % has ranged from 1.64 to 42.81 over the past decade. 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 Semiconductors company?
The median Operating Margin % among Semiconductors companies is 5.63, based on 1,023 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. 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 M31 Technology and its competitors. For the Semiconductors industry, the median Operating Margin % is 5.63 — values significantly above this may indicate overvaluation, while values below may suggest a bargain or underlying issues. M31 Technology's current Operating Margin % is -14.58%. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is M31 Technology stock overvalued right now?
Based on GuruFocus' analysis, M31 Technology (ROCO:6643) is currently considered Significantly Undervalued. The stock's GF Value™ is NT$829.31, compared to a current price of NT$450.00 — trading 45.7% below its estimated fair value. The current Operating Margin % is -14.58%. M31 Technology's overall GF Score™ is 86/100 with 4 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 M31 Technology (ROCO:6643), the current Operating Margin % is -14.58% as of Mar. 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 M31 Technology (ROCO:6643) Overvalued in 2026?
Based on GuruFocus' analysis, M31 Technology stock appears to be undervalued.
The current stock price of NT$450.00 is trading 45.7% below its estimated GF Value™ of NT$829.31.
GuruFocus considers M31 Technology to be Significantly Undervalued.
Key valuation signals for ROCO:6643:
Operating Margin %: -14.58%
GF Value™: NT$829.31 vs. price of NT$450.00 (45.7% below fair value)
No single metric tells the full story. See the ROCO:6643 stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.
M31 Technology Corp is a professional silicon intellectual property (IP) provider. The company focuses on providing high-speed interface IPs, memory compilers, and standard cell library solutions. The company provides customers with differentiated IP solutions. These solutions help customers grasp market opportunities in short design cycles, low manufacturing costs, and high product competitiveness.
86GF Score
Get the complete analysis for ROCO:6643
Operating Margin % is just one metric. See GF Value™, 30-year financials, guru trades, warning signs, and more.
Quick Browse
Personalize
Premium Gurus 
Create New Portfolio
ROCO:6643 has been successfully added to your 
