CarMaxMEX:KMX 58 Operating Margin % is 0.40% as of May. 2026, which is 75% below its 10-year median of 1.59. GuruFocus rates MEX:KMX with a GF Score™ of 58/100 and a GF Value™ of MXN1,351.49 (Possible Value Trap). The stock has 5 warning signs investors should review. Among 1,325 Vehicles & Parts companies, CarMax ranks worse than 84.23% on this metric.
Operating Margin % is calculated as Operating Income divided by its Revenue. CarMax's Operating Income for the
three
months ended in May. 2026 was MXN550 Mil. CarMax's Revenue for the
three
months ended in May. 2026 was MXN139,033 Mil. Therefore, CarMax's Operating Margin % for the quarter that ended in May. 2026 was 0.40%.
The historical rank and industry rank for CarMax's Operating Margin % or its related term are showing as below:
MEX:KMX'
s Operating Margin % Range Over the Past 10 Years
Min: -1.78 Med: 1.59 Max: 3.23
Current: -1.78
MEX:KMX's Operating Margin % is ranked worse than 84.23% of 1325
companies
in the Vehicles & Parts industry
Industry Median: 4.86
vs MEX:KMX: -1.78
CarMax's 5-Year Average Operating Margin % Growth Rate was 0.00% per year.
CarMax's Operating Income for the
three
months ended in May. 2026 was MXN550 Mil.
Its Operating Income for the trailing twelve months (TTM) ended in May. 2026 was MXN-8,422 Mil.
CarMax (MEX:KMX) Operating Margin % Explanation
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.
CarMax Operating Margin % Related Terms
CarMax Operating Margin % Historical Data
* Premium members only.
The historical data trend for CarMax'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.
MEX:KMX vs AN, LAD, RUSHA: Operating Margin % Comparison
For the Auto & Truck Dealerships subindustry, CarMax'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.
CarMax Operating Margin % vs Vehicles & Parts Industry
For the Vehicles & Parts industry and Consumer Cyclical sector, CarMax's Operating Margin % distribution charts can be found below:
* The bar in red indicates where CarMax'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.
CarMax's Operating Margin % for the fiscal year that ended in Feb. 2026 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.
CarMax (MEX:KMX) has a Operating Margin % of 0.40% as of May. 2026. Operating margin is the ratio of total operating income to net sales. View historical data on CarMax and its competitors. This is 75% below median its historical median of 1.59. According to the industry distribution chart, CarMax ranks #1116 out of 1325 companies in the Vehicles & Parts industry, placing it in the top 84.2%.
Is CarMax's Operating Margin % too high?
CarMax's current Operating Margin % of 0.40% is 75% below median its 10-year median of 1.59. The Vehicles & Parts industry median Operating Margin % is 4.86. CarMax's value of 0.40% is 91.8% below this industry median. Based on the distribution chart, CarMax ranks #1116 out of 1325 companies in the Vehicles & Parts industry, which is in the bottom quartile relative to peers. Overall, CarMax has a GF Score™ of 58/100 and is considered Possible Value Trap, reflecting its overall financial health beyond just this single metric.
How does CarMax's Operating Margin % compare to AN and LAD?
According to the Vehicles & Parts industry distribution chart, CarMax ranks #1116 out of 1325 companies for Operating Margin %. This places CarMax in the lower half of its industry. The industry median Operating Margin % is 4.86. CarMax's value of 0.40% is 91.8% below this benchmark. While the company's 10-year median is 1.59 vs. the industry median of 4.86, CarMax 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 a Vehicles & Parts company?
The median Operating Margin % among Vehicles & Parts companies is 4.86, based on 1,325 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. CarMax's current Operating Margin % of 0.40% is 91.8% 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 CarMax and its competitors. For the Vehicles & Parts industry, the median Operating Margin % is 4.86 — values significantly above this may indicate overvaluation, while values below may suggest a bargain or underlying issues. CarMax's current Operating Margin % is 0.40%, which is 75% below median its own 10-year median of 1.59. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is CarMax stock overvalued right now?
Based on GuruFocus' analysis, CarMax (MEX:KMX) is currently considered Possible Value Trap. The stock's GF Value™ is MXN1,351.49, compared to a current price of MXN850.00 — trading 37.1% below its estimated fair value. The current Operating Margin % is 0.40%, which is 75% below median its 10-year median of 1.59 and 91.8% below the Vehicles & Parts industry median of 4.86. CarMax's overall GF Score™ is 58/100 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 CarMax (MEX:KMX), the current Operating Margin % is 0.40% as of May. 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 CarMax (MEX:KMX) Overvalued in 2026?
Based on GuruFocus' analysis, CarMax stock appears to be undervalued.
The current stock price of MXN850.00 is trading 37.1% below its estimated GF Value™ of MXN1,351.49.
GuruFocus considers CarMax to be Possible Value Trap.
Key valuation signals for MEX:KMX:
Operating Margin %: 0.40% (75% below median its 10-year median of 1.59)
GF Value™: MXN1,351.49 vs. price of MXN850.00 (37.1% below fair value)
Industry Position: 91.8% below the Vehicles & Parts median (#1116 of 1325)
No single metric tells the full story. See the MEX:KMX stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.
CarMax sells, finances, and services used and new cars through a chain of over about 260 retail stores. It was formed in 1993 as a unit of Circuit City and spun off into an independent company in late 2002. Used-vehicle sales were 80% of fiscal 2026 revenue and wholesale about 17%, with the remaining portion composed of extended service plans and repair. In fiscal 2026, the company retailed and wholesaled 780,684 and 538,203 used vehicles, respectively. CarMax is the largest used-vehicle retailer in the US, but still estimates that it had only about 3.6% US market share of vehicles zero to 10 years old in calendar 2025. CarMax is based in Richmond, Virginia.
58GF Score
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