Fulltech Fiber GlassROCO:1815 -3.02%59 Operating Margin % is 12.18% as of Dec. 2025, which is 41% above its 10-year median of 8.63. GuruFocus rates ROCO:1815 with a GF Score™ of 59/100 and a GF Value™ of NT$35.94 (Significantly Overvalued). The stock has 1 warning sign investors should review. Among 2,472 Hardware companies, Fulltech Fiber Glass ranks better than 87.14% on this metric.
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.
Fulltech Fiber Glass Operating Margin % Related Terms
Fulltech Fiber Glass Operating Margin % Historical Data
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The historical data trend for Fulltech Fiber Glass'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:1815 vs APH, GLW: Operating Margin % Comparison
For the Electronic Components subindustry, Fulltech Fiber Glass'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.
Fulltech Fiber Glass Operating Margin % vs Hardware Industry
For the Hardware industry and Technology sector, Fulltech Fiber Glass's Operating Margin % distribution charts can be found below:
* The bar in red indicates where Fulltech Fiber Glass'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.
Fulltech Fiber Glass'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.
Fulltech Fiber Glass (ROCO:1815) has a Operating Margin % of 12.18% as of Dec. 2025. Operating margin is the ratio of total operating income to net sales. View historical data on Fulltech Fiber Glass and its competitors. This is 41% above median its historical median of 8.63. According to the industry distribution chart, Fulltech Fiber Glass ranks #318 out of 2472 companies in the Hardware industry, placing it in the top 12.9%.
Is Fulltech Fiber Glass' Operating Margin % too high?
Fulltech Fiber Glass' current Operating Margin % of 12.18% is 41% above median its 10-year median of 8.63. The Hardware industry median Operating Margin % is 3.83. Fulltech Fiber Glass' value of 12.18% is 218% above this industry median. Based on the distribution chart, Fulltech Fiber Glass ranks #318 out of 2472 companies in the Hardware industry, which is in the top quartile — a strong position relative to peers. Overall, Fulltech Fiber Glass has a GF Score™ of 59/100 and is considered Significantly Overvalued, reflecting its overall financial health beyond just this single metric.
How does Fulltech Fiber Glass' Operating Margin % compare to APH and GLW?
According to the Hardware industry distribution chart, Fulltech Fiber Glass ranks #318 out of 2472 companies for Operating Margin %. This places Fulltech Fiber Glass in the top 13% of its industry — outperforming the majority of peers. The industry median Operating Margin % is 3.83. Fulltech Fiber Glass' value of 12.18% is 218% above this benchmark. While the company's 10-year median is 8.63 vs. the industry median of 3.83, Fulltech Fiber Glass 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 3.83, 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. Fulltech Fiber Glass's current Operating Margin % of 12.18% is 218% 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 Fulltech Fiber Glass and its competitors. For the Hardware industry, the median Operating Margin % is 3.83 — values significantly above this may indicate overvaluation, while values below may suggest a bargain or underlying issues. Fulltech Fiber Glass's current Operating Margin % is 12.18%, which is 41% above median its own 10-year median of 8.63. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is Fulltech Fiber Glass stock overvalued right now?
Based on GuruFocus' analysis, Fulltech Fiber Glass (ROCO:1815) is currently considered Significantly Overvalued. The stock's GF Value™ is NT$35.94, compared to a current price of NT$96.50 — trading 168.5% above its estimated fair value. The current Operating Margin % is 12.18%, which is 41% above median its 10-year median of 8.63 and 218% above the Hardware industry median of 3.83. Fulltech Fiber Glass' overall GF Score™ is 59/100 with 1 warning sign 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 Fulltech Fiber Glass (ROCO:1815), the current Operating Margin % is 12.18% 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 Fulltech Fiber Glass (ROCO:1815) Overvalued in 2026?
Based on GuruFocus' analysis, Fulltech Fiber Glass stock appears to be overvalued.
The current stock price of NT$96.50 is trading 168.5% above its estimated GF Value™ of NT$35.94.
GuruFocus considers Fulltech Fiber Glass to be Significantly Overvalued.
Key valuation signals for ROCO:1815:
Operating Margin %: 12.18% (41% above median its 10-year median of 8.63)
GF Value™: NT$35.94 vs. price of NT$96.50 (168.5% above fair value)
Industry Position: 218% above the Hardware median (#318 of 2472)
No single metric tells the full story. See the ROCO:1815 stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.
Fulltech Fiber Glass Corp is engaged in producing and selling fiberglass yarn and fiberglass fabric, which are the main upstream materials for Printed Circuit Boards. The reportable segments of the company are the Fiberglass Yarn and the Fiberglass Fabric segment. Geographically, the company generates a majority of its revenue from Taiwan and the rest from China.
59GF Score
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