Duro FelgueraFRA:DF5B -6.10%4 Operating Margin % is -108.02% as of Dec. 2025. GuruFocus rates FRA:DF5B with a GF Score™ of 4/100 and a GF Value™ of €0.17 (Modestly Overvalued). The stock has 7 warning signs investors should review. Among 1,767 Construction companies, Duro Felguera ranks worse than 96.04% on this metric.
Operating Margin % is calculated as Operating Income divided by its Revenue. Duro Felguera's Operating Income for the
six
months ended in Dec. 2025 was €-47.8 Mil. Duro Felguera's Revenue for the
six
months ended in Dec. 2025 was €44.3 Mil. Therefore, Duro Felguera's Operating Margin % for the quarter that ended in Dec. 2025 was -108.02%.
Warning Sign:
Duro Felguera SA operating margin has been in a 5-year decline. The average rate of decline per year is -1.9%.
The historical rank and industry rank for Duro Felguera's Operating Margin % or its related term are showing as below:
FRA:DF5B'
s Operating Margin % Range Over the Past 10 Years
Min: -36.28 Med: -26.49 Max: 1.65
Current: -36.28
FRA:DF5B's Operating Margin % is ranked worse than 96.04% of 1767
companies
in the Construction industry
Industry Median: 5.89
vs FRA:DF5B: -36.28
Duro Felguera's 5-Year Average Operating Margin % Growth Rate was -1.90% per year.
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.
Duro Felguera Operating Margin % Related Terms
Duro Felguera Operating Margin % Historical Data
* Premium members only.
The historical data trend for Duro Felguera'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.
FRA:DF5B vs PWR, FIX, EME: Operating Margin % Comparison
For the Engineering & Construction subindustry, Duro Felguera'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.
Duro Felguera Operating Margin % vs Construction Industry
For the Construction industry and Industrials sector, Duro Felguera's Operating Margin % distribution charts can be found below:
* The bar in red indicates where Duro Felguera'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.
Duro Felguera'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.
Duro Felguera (FRA:DF5B) has a Operating Margin % of -108.02% as of Dec. 2025. Operating margin is the ratio of total operating income to net sales. View historical data on Duro Felguera and its competitors. According to the industry distribution chart, Duro Felguera ranks #1697 out of 1767 companies in the Construction industry, placing it in the top 96%.
Is Duro Felguera's Operating Margin % too high?
Duro Felguera's current Operating Margin % is -108.02%. Based on the distribution chart, Duro Felguera ranks #1697 out of 1767 companies in the Construction industry, which is in the bottom quartile relative to peers. Overall, Duro Felguera has a GF Score™ of 4/100 and is considered Modestly Overvalued, reflecting its overall financial health beyond just this single metric.
How does Duro Felguera's Operating Margin % compare to PWR and FIX?
According to the Construction industry distribution chart, Duro Felguera ranks #1697 out of 1767 companies for Operating Margin %. This places Duro Felguera in the lower half of its industry. The industry median Operating Margin % is 5.89. 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 Construction company?
The median Operating Margin % among Construction companies is 5.89, based on 1,767 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 Duro Felguera and its competitors. For the Construction industry, the median Operating Margin % is 5.89 — values significantly above this may indicate overvaluation, while values below may suggest a bargain or underlying issues. Duro Felguera's current Operating Margin % is -108.02%. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is Duro Felguera stock overvalued right now?
Based on GuruFocus' analysis, Duro Felguera (FRA:DF5B) is currently considered Modestly Overvalued. The stock's GF Value™ is €0.17, compared to a current price of €0.20 — trading 17.6% above its estimated fair value. The current Operating Margin % is -108.02%. Duro Felguera's overall GF Score™ is 4/100 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 Duro Felguera (FRA:DF5B), the current Operating Margin % is -108.02% 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 Duro Felguera (FRA:DF5B) Overvalued in 2026?
Based on GuruFocus' analysis, Duro Felguera stock appears to be overvalued.
The current stock price of €0.20 is trading 17.6% above its estimated GF Value™ of €0.17.
GuruFocus considers Duro Felguera to be Modestly Overvalued.
Key valuation signals for FRA:DF5B:
Operating Margin %: -108.02%
GF Value™: €0.17 vs. price of €0.20 (17.6% above fair value)
No single metric tells the full story. See the FRA:DF5B stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.
Duro Felguera SA is a Spain based company engaged in executing turnkey projects for the energy, industrial and oil and gas sectors. It supplies specialized services for industries and manufactures capital goods. The company is involved in carrying out integrated projects for the construction of power generation plants, mineral treatment and bulk-handling facilities, fuel storage plants and other facilities and installations for the oil and gas industry. In the services area, the organization specializes in the erection of energy and industrial facilities. The business segments of the group are Energy; Mining and Handling; Oil and Gas; Services; Manufacturing of capital goods; and Communications.
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