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Thai Nam Plastic PCLBKK:TNPC -2.17%47 ROC (Joel Greenblatt) % is 1.15% as of Mar. 2026, which is 76% below its 10-year median of 4.87. GuruFocus rates BKK:TNPC with a GF Score™ of 47/100 and a GF Value™ of ฿0.91 (Fairly Valued). The stock has 7 warning signs investors should review. Among 1,331 Vehicles & Parts companies, Thai Nam Plastic PCL ranks worse than 84.9% on this metric.
Joel Greenblatt defined Return on Capital differently in his book The Little Book That Still Beats the Market (Little Books. Big Profits). He defines ROC (Joel Greenblatt) % as EBIT divided by the total of Property, Plant and Equipment and net working capital. Thai Nam Plastic PCL's annualized ROC (Joel Greenblatt) % for the quarter that ended in Mar. 2026 was 1.15%.
The historical rank and industry rank for Thai Nam Plastic PCL's ROC (Joel Greenblatt) % or its related term are showing as below:
BKK:TNPC'
s ROC (Joel Greenblatt) % Range Over the Past 10 Years
Min: -13.01 Med: 4.87 Max: 15.17
Current: -4.28
During the past 13 years, Thai Nam Plastic PCL's highest ROC (Joel Greenblatt) % was 15.17%. The lowest was -13.01%. And the median was 4.87%.
BKK:TNPC's ROC (Joel Greenblatt) % is ranked worse than 84.9% of 1331
companies
in the Vehicles & Parts industry
Industry Median: 12.03
vs BKK:TNPC: -4.28
Thai Nam Plastic PCL's 5-Year average Growth Rate of ROC (Joel Greenblatt) % was 0.00% per year.
Thai Nam Plastic PCL (BKK:TNPC) ROC (Joel Greenblatt) % Explanation
The way Joel Greenblatt defines Return on Capital is a more accurate measure of how efficiently the company generates returns onthe capital actually invested in the business. EBIT is used instead of net income because the tax and interest payment may be affected by factors other than the core business operation. Intangible assets are not included in the calculation because they don't need to be replaced.
Thai Nam Plastic PCL ROC (Joel Greenblatt) % Related Terms
Thai Nam Plastic PCL ROC (Joel Greenblatt) % Historical Data
* Premium members only.
The historical data trend for Thai Nam Plastic PCL's ROC (Joel Greenblatt) % 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.
Thai Nam Plastic PCL ROC (Joel Greenblatt) % Chart
BKK:TNPC vs ORLY, AZO: ROC (Joel Greenblatt) % Comparison
For the Auto Parts subindustry, Thai Nam Plastic PCL's ROC (Joel Greenblatt) %, along with its competitors' market caps and ROC (Joel Greenblatt) % 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.
Thai Nam Plastic PCL ROC (Joel Greenblatt) % vs Vehicles & Parts Industry
For the Vehicles & Parts industry and Consumer Cyclical sector, Thai Nam Plastic PCL's ROC (Joel Greenblatt) % distribution charts can be found below:
* The bar in red indicates where Thai Nam Plastic PCL's ROC (Joel Greenblatt) % falls into.
Thai Nam Plastic PCL ROC (Joel Greenblatt) % Calculation
Joel Greenblatt defined Return on Capital differently in his book The Little Book That Still Beats the Market (Little Books. Big Profits) . He defines Return on Capital as follows:
EBIT stands for Earnings Before Interest and Taxes.
Fixed Assets are also known as non-current assets. They include the Property, Plant and Equipment that the firm needs in its operation.
GuruFocus calculates net working capital as: (Accounts Receivable + Total Inventories + Other Current Assets) - (Accounts Payable & Accrued Expense + Deferred Revenue + Other Current Liabilities). We're trying to account for OPERATING assets and liabilities (part of daily business) when calculating working capital. Cash and marketable securities are considered NON-OPERATING assets and are not included in calculation. We will also back out all interest bearing debt, short term debt and the portion of long term debt that is due in the current period from the current liabilities. This debt will be considered when computing cost of capital and it would be inappropriate to count it twice.
Note:
The EBIT data used here is four times the quarterly (Mar. 2026) EBIT data.
* 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.
What does a ROC (Joel Greenblatt) % of 1.15% mean?
Thai Nam Plastic PCL (BKK:TNPC) has a ROC (Joel Greenblatt) % of 1.15% as of Mar. 2026. Joel Greenblatt's return on capital is the ratio of EBIT to average fixed assets and net working capital. View historical data on Thai Nam Plastic PCL and its competitors. This is 76% below median its historical median of 4.87. According to the industry distribution chart, Thai Nam Plastic PCL ranks #1130 out of 1331 companies in the Vehicles & Parts industry, placing it in the top 84.9%.
Is Thai Nam Plastic PCL's ROC (Joel Greenblatt) % too high?
Thai Nam Plastic PCL's current ROC (Joel Greenblatt) % of 1.15% is 76% below median its 10-year median of 4.87. The Vehicles & Parts industry median ROC (Joel Greenblatt) % is 12.03. Thai Nam Plastic PCL's value of 1.15% is 90.4% below this industry median. Based on the distribution chart, Thai Nam Plastic PCL ranks #1130 out of 1331 companies in the Vehicles & Parts industry, which is in the bottom quartile relative to peers. Overall, Thai Nam Plastic PCL has a GF Score™ of 47/100 and is considered Fairly Valued, reflecting its overall financial health beyond just this single metric.
How does Thai Nam Plastic PCL's ROC (Joel Greenblatt) % compare to ORLY and AZO?
According to the Vehicles & Parts industry distribution chart, Thai Nam Plastic PCL ranks #1130 out of 1331 companies for ROC (Joel Greenblatt) %. This places Thai Nam Plastic PCL in the lower half of its industry. The industry median ROC (Joel Greenblatt) % is 12.03. Thai Nam Plastic PCL's value of 1.15% is 90.4% below this benchmark. While the company's 10-year median is 4.87 vs. the industry median of 12.03, Thai Nam Plastic PCL 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 ROC (Joel Greenblatt) % for a Vehicles & Parts company?
The median ROC (Joel Greenblatt) % among Vehicles & Parts companies is 12.03, based on 1,331 companies in the industry. Companies in the top quartile (top 25%) have a ROC (Joel Greenblatt) % significantly above this median, while those in the bottom quartile fall well below. However, ROC (Joel Greenblatt) % should not be evaluated in isolation — investors should consider it alongside profitability, growth, and financial strength metrics. Thai Nam Plastic PCL's current ROC (Joel Greenblatt) % of 1.15% is 90.4% 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 ROC (Joel Greenblatt) % mean?
A high ROC (Joel Greenblatt) % can signal that a stock is expensive relative to its fundamentals. Joel Greenblatt's return on capital is the ratio of EBIT to average fixed assets and net working capital. View historical data on Thai Nam Plastic PCL and its competitors. For the Vehicles & Parts industry, the median ROC (Joel Greenblatt) % is 12.03 — values significantly above this may indicate overvaluation, while values below may suggest a bargain or underlying issues. Thai Nam Plastic PCL's current ROC (Joel Greenblatt) % is 1.15%, which is 76% below median its own 10-year median of 4.87. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is Thai Nam Plastic PCL stock overvalued right now?
Based on GuruFocus' analysis, Thai Nam Plastic PCL (BKK:TNPC) is currently considered Fairly Valued. The stock's GF Value™ is ฿0.91, compared to a current price of ฿0.90 — trading 1.1% below its estimated fair value. The current ROC (Joel Greenblatt) % is 1.15%, which is 76% below median its 10-year median of 4.87 and 90.4% below the Vehicles & Parts industry median of 12.03. Thai Nam Plastic PCL's overall GF Score™ is 47/100 with 7 warning signs to review. Investors should evaluate multiple metrics — including profitability, growth, and financial strength — before making a decision.
How is ROC (Joel Greenblatt) % calculated?
ROC (Joel Greenblatt) % is calculated from a company's financial statements. For Thai Nam Plastic PCL (BKK:TNPC), the current ROC (Joel Greenblatt) % is 1.15% 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 Thai Nam Plastic PCL (BKK:TNPC) Overvalued in 2026?
Based on GuruFocus' analysis, Thai Nam Plastic PCL stock appears to be undervalued.
The current stock price of ฿0.90 is trading 1.1% below its estimated GF Value™ of ฿0.91.
GuruFocus considers Thai Nam Plastic PCL to be Fairly Valued.
Key valuation signals for BKK:TNPC:
ROC (Joel Greenblatt) %: 1.15% (76% below median its 10-year median of 4.87)
GF Value™: ฿0.91 vs. price of ฿0.90 (1.1% below fair value)
Industry Position: 90.4% below the Vehicles & Parts median (#1130 of 1331)
No single metric tells the full story. See the BKK:TNPC stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.
Thai Nam Plastic PCL engages in the production and distribution of flexible plastic, synthetic leather, and car mats. The Group's main business operations are the manufacture and distribution of semi-finished plastic products, synthetic leather, and film/sheet for the industries of Automotive, sports shoes, furniture, and fashionable leather, and flexible film/sheet for applications in household, civil engineering, and agricultural functions. The company has domestic and international areas, with the majority of revenue from Domestic.
47GF Score
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