PetroVietnam OilHSTC:OIL -0.75%95 Operating Margin % is 1.39% as of Mar. 2026, which is 396% above its 10-year median of 0.28. GuruFocus rates HSTC:OIL with a GF Score™ of 95/100 and a GF Value™ of ₫16,244.30 (Modestly Undervalued). The stock has 5 warning signs investors should review. Among 916 Oil & Gas companies, PetroVietnam Oil ranks worse than 71.51% 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.
PetroVietnam Oil Operating Margin % Related Terms
PetroVietnam Oil Operating Margin % Historical Data
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The historical data trend for PetroVietnam Oil'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.
HSTC:OIL vs VLO, MPC, PSX: Operating Margin % Comparison
For the Oil & Gas Refining & Marketing subindustry, PetroVietnam Oil'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.
PetroVietnam Oil Operating Margin % vs Oil & Gas Industry
For the Oil & Gas industry and Energy sector, PetroVietnam Oil's Operating Margin % distribution charts can be found below:
* The bar in red indicates where PetroVietnam Oil'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.
PetroVietnam Oil'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.
PetroVietnam Oil (HSTC:OIL) has a Operating Margin % of 1.39% as of Mar. 2026. Operating margin is the ratio of total operating income to net sales. View historical data on PetroVietnam Oil and its competitors. This is 396% above median its historical median of 0.28. According to the industry distribution chart, PetroVietnam Oil ranks #655 out of 916 companies in the Oil & Gas industry, placing it in the top 71.5%.
Is PetroVietnam Oil's Operating Margin % too high?
PetroVietnam Oil's current Operating Margin % of 1.39% is 396% above median its 10-year median of 0.28. The Oil & Gas industry median Operating Margin % is 6.86. PetroVietnam Oil's value of 1.39% is 79.7% below this industry median. Based on the distribution chart, PetroVietnam Oil ranks #655 out of 916 companies in the Oil & Gas industry, which is below the industry midpoint. Overall, PetroVietnam Oil has a GF Score™ of 95/100 and is considered Modestly Undervalued, reflecting its overall financial health beyond just this single metric.
How does PetroVietnam Oil's Operating Margin % compare to VLO and MPC?
According to the Oil & Gas industry distribution chart, PetroVietnam Oil ranks #655 out of 916 companies for Operating Margin %. This places PetroVietnam Oil in the lower half of its industry. The industry median Operating Margin % is 6.86. PetroVietnam Oil's value of 1.39% is 79.7% below this benchmark. While the company's 10-year median is 0.28 vs. the industry median of 6.86, PetroVietnam Oil has consistently been below 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 an Oil & Gas company?
The median Operating Margin % among Oil & Gas companies is 6.86, based on 916 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. PetroVietnam Oil's current Operating Margin % of 1.39% is 79.7% below 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 PetroVietnam Oil and its competitors. For the Oil & Gas industry, the median Operating Margin % is 6.86 — values significantly above this may indicate overvaluation, while values below may suggest a bargain or underlying issues. PetroVietnam Oil's current Operating Margin % is 1.39%, which is 396% above median its own 10-year median of 0.28. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is PetroVietnam Oil stock overvalued right now?
Based on GuruFocus' analysis, PetroVietnam Oil (HSTC:OIL) is currently considered Modestly Undervalued. The stock's GF Value™ is ₫16,244.30, compared to a current price of ₫13,200.00 — trading 18.7% below its estimated fair value. The current Operating Margin % is 1.39%, which is 396% above median its 10-year median of 0.28 and 79.7% below the Oil & Gas industry median of 6.86. PetroVietnam Oil's overall GF Score™ is 95/100 with 5 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 PetroVietnam Oil (HSTC:OIL), the current Operating Margin % is 1.39% 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 PetroVietnam Oil (HSTC:OIL) Overvalued in 2026?
Based on GuruFocus' analysis, PetroVietnam Oil stock appears to be undervalued.
The current stock price of ₫13,200.00 is trading 18.7% below its estimated GF Value™ of ₫16,244.30.
GuruFocus considers PetroVietnam Oil to be Modestly Undervalued.
Key valuation signals for HSTC:OIL:
Operating Margin %: 1.39% (396% above median its 10-year median of 0.28)
GF Value™: ₫16,244.30 vs. price of ₫13,200.00 (18.7% below fair value)
Industry Position: 79.7% below the Oil & Gas median (#655 of 916)
No single metric tells the full story. See the HSTC:OIL stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.
PetroVietnam Oil Corp is engaged in the downstream sector of the oil and gas industry, especially in importing & exporting, trading crude oil & blending, storing, and distributing oil products.
95GF Score
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