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Fulltech Fiber GlassROCO:1815 -6.34%61 ROC (Joel Greenblatt) % is 16.77% as of Dec. 2025, which is 276% above its 10-year median of 4.46. GuruFocus rates ROCO:1815 with a GF Score™ of 61/100 and a GF Value™ of NT$36.01 (Significantly Overvalued). The stock has 1 warning sign investors should review. Among 2,491 Hardware companies, Fulltech Fiber Glass ranks worse than 51.14% 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. Fulltech Fiber Glass's annualized ROC (Joel Greenblatt) % for the quarter that ended in Dec. 2025 was 16.77%.
The historical rank and industry rank for Fulltech Fiber Glass's ROC (Joel Greenblatt) % or its related term are showing as below:
ROCO:1815'
s ROC (Joel Greenblatt) % Range Over the Past 10 Years
Min: -6.33 Med: 4.46 Max: 9.78
Current: 9.78
During the past 13 years, Fulltech Fiber Glass's highest ROC (Joel Greenblatt) % was 9.78%. The lowest was -6.33%. And the median was 4.46%.
ROCO:1815's ROC (Joel Greenblatt) % is ranked worse than 51.14% of 2491
companies
in the Hardware industry
Industry Median: 10.44
vs ROCO:1815: 9.78
Fulltech Fiber Glass's 5-Year average Growth Rate of ROC (Joel Greenblatt) % was 0.00% per year.
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.
Fulltech Fiber Glass ROC (Joel Greenblatt) % Related Terms
Fulltech Fiber Glass ROC (Joel Greenblatt) % Historical Data
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The historical data trend for Fulltech Fiber Glass'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.
ROCO:1815 vs APH, GLW: ROC (Joel Greenblatt) % Comparison
For the Electronic Components subindustry, Fulltech Fiber Glass'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.
Fulltech Fiber Glass ROC (Joel Greenblatt) % vs Hardware Industry
For the Hardware industry and Technology sector, Fulltech Fiber Glass's ROC (Joel Greenblatt) % distribution charts can be found below:
* The bar in red indicates where Fulltech Fiber Glass's ROC (Joel Greenblatt) % falls into.
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 (Dec. 2025) 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 16.77% mean?
Fulltech Fiber Glass (ROCO:1815) has a ROC (Joel Greenblatt) % of 16.77% as of Dec. 2025. Joel Greenblatt's return on capital is the ratio of EBIT to average fixed assets and net working capital. View historical data on Fulltech Fiber Glass and its competitors. This is 276% above median its historical median of 4.46. According to the industry distribution chart, Fulltech Fiber Glass ranks #1274 out of 2491 companies in the Hardware industry, placing it in the top 51.1%.
Is Fulltech Fiber Glass' ROC (Joel Greenblatt) % too high?
Fulltech Fiber Glass' current ROC (Joel Greenblatt) % of 16.77% is 276% above median its 10-year median of 4.46. The Hardware industry median ROC (Joel Greenblatt) % is 10.44. Fulltech Fiber Glass' value of 16.77% is 60.6% above this industry median. Based on the distribution chart, Fulltech Fiber Glass ranks #1274 out of 2491 companies in the Hardware industry, which is below the industry midpoint. Overall, Fulltech Fiber Glass has a GF Score™ of 61/100 and is considered Significantly Overvalued, reflecting its overall financial health beyond just this single metric.
How does Fulltech Fiber Glass' ROC (Joel Greenblatt) % compare to APH and GLW?
According to the Hardware industry distribution chart, Fulltech Fiber Glass ranks #1274 out of 2491 companies for ROC (Joel Greenblatt) %. This places Fulltech Fiber Glass in the lower half of its industry. The industry median ROC (Joel Greenblatt) % is 10.44. Fulltech Fiber Glass' value of 16.77% is 60.6% above this benchmark. While the company's 10-year median is 4.46 vs. the industry median of 10.44, 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 ROC (Joel Greenblatt) % for a Hardware company?
The median ROC (Joel Greenblatt) % among Hardware companies is 10.44, based on 2,491 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. Fulltech Fiber Glass's current ROC (Joel Greenblatt) % of 16.77% is 60.6% 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 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 Fulltech Fiber Glass and its competitors. For the Hardware industry, the median ROC (Joel Greenblatt) % is 10.44 — values significantly above this may indicate overvaluation, while values below may suggest a bargain or underlying issues. Fulltech Fiber Glass's current ROC (Joel Greenblatt) % is 16.77%, which is 276% above median its own 10-year median of 4.46. 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$36.01, compared to a current price of NT$73.90 — trading 105.2% above its estimated fair value. The current ROC (Joel Greenblatt) % is 16.77%, which is 276% above median its 10-year median of 4.46 and 60.6% above the Hardware industry median of 10.44. Fulltech Fiber Glass' overall GF Score™ is 61/100 with 1 warning sign 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 Fulltech Fiber Glass (ROCO:1815), the current ROC (Joel Greenblatt) % is 16.77% 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$73.90 is trading 105.2% above its estimated GF Value™ of NT$36.01.
GuruFocus considers Fulltech Fiber Glass to be Significantly Overvalued.
Key valuation signals for ROCO:1815:
ROC (Joel Greenblatt) %: 16.77% (276% above median its 10-year median of 4.46)
GF Value™: NT$36.01 vs. price of NT$73.90 (105.2% above fair value)
Industry Position: 60.6% above the Hardware median (#1274 of 2491)
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.
61GF Score
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ROC (Joel Greenblatt) % is just one metric. See GF Value™, 30-year financials, guru trades, warning signs, and more.
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