Fulltech Fiber Glass (ROCO:1815) Effective Interest Rate on Debt %: 3.00% (As of Mar. 2026)

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ROCO:1815 Fulltech Fiber Glass Corp ROCO:1815
66 GF Score
Price NT$60.30
GF Value NT$40.44
Valuation Significantly Overvalued
! 1 Warning Sign
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What is Fulltech Fiber Glass Effective Interest Rate on Debt %?

Fulltech Fiber Glass ROCO:1815 -3.83% 66 Effective Interest Rate on Debt % is 3.00% as of Mar. 2026. GuruFocus rates ROCO:1815 with a GF Score™ of 66/100 and a GF Value™ of NT$40.44 (Significantly Overvalued). The stock has 1 warning sign investors should review.

Effective Interest Rate on Debt % is the usage rate that a borrower actually pays on a debt. It is calculated as the positive value of Interest Expense divided by its average total debt. Total debt equals to Long-Term Debt & Capital Lease Obligation plus Short-Term Debt & Capital Lease Obligation. Fulltech Fiber Glass's annualized positive value of Interest Expense for the quarter that ended in Mar. 2026 was NT$143 Mil. Fulltech Fiber Glass's average total debt for the quarter that ended in Mar. 2026 was NT$4,758 Mil. Therefore, Fulltech Fiber Glass's annualized Effective Interest Rate on Debt % for the quarter that ended in Mar. 2026 was 3.00%.


Fulltech Fiber Glass  (ROCO:1815) Effective Interest Rate on Debt % Explanation

Effective Interest Rate on Debt % measures the usage rate that a borrower actually pays on a debt.


Fulltech Fiber Glass Effective Interest Rate on Debt % Related Terms


Fulltech Fiber Glass Effective Interest Rate on Debt % Historical Data

* Premium members only.

The historical data trend for Fulltech Fiber Glass's Effective Interest Rate on Debt % 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.

Fulltech Fiber Glass Effective Interest Rate on Debt % Chart

Fulltech Fiber Glass Annual Data
Trend Dec16 Dec17 Dec18 Dec19 Dec20 Dec21 Dec22 Dec23 Dec24 Dec25
Effective Interest Rate on Debt %
Get a 7-Day Free Trial Premium Member Only Premium Member Only 1.91 2.32 3.13 3.23 3.48

Fulltech Fiber Glass Quarterly Data
Jun21 Sep21 Dec21 Mar22 Jun22 Sep22 Dec22 Mar23 Jun23 Sep23 Dec23 Mar24 Jun24 Sep24 Dec24 Mar25 Jun25 Sep25 Dec25 Mar26
Effective Interest Rate on Debt % Get a 7-Day Free Trial Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only 2.80 2.73 2.71 3.47 3.00

ROCO:1815 vs APH, GLW, TEL: Effective Interest Rate on Debt % Comparison

For the Electronic Components subindustry, Fulltech Fiber Glass's Effective Interest Rate on Debt %, along with its competitors' market caps and Effective Interest Rate on Debt % 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 Effective Interest Rate on Debt % vs Hardware Industry

For the Hardware industry and Technology sector, Fulltech Fiber Glass's Effective Interest Rate on Debt % distribution charts can be found below:

* The bar in red indicates where Fulltech Fiber Glass's Effective Interest Rate on Debt % falls into.


ROCO:1815
66GF Score
Fulltech Fiber Glass Corp ROCO:1815
Effective Interest Rate on Debt % is just one metric. See GF Score™, valuation, warning signs, and more.
View Full Analysis

Fulltech Fiber Glass Effective Interest Rate on Debt % Calculation

Fulltech Fiber Glass's annualized Effective Interest Rate on Debt % for the fiscal year that ended in Dec. 2025 is calculated as

Effective Interest Rate on Debt %
=-1  *  Interest Expense/( (Total Debt  (A: Dec. 2024 )+Total Debt  (A: Dec. 2025 ))/ count )
=-1  *  -187.031/( (6231.844+4516.65)/ 2 )
=-1  *  -187.031/5374.247
=3.48 %

where

Total Debt  (A: Dec. 2024 )
=Long-Term Debt & Capital Lease Obligation + Short-Term Debt & Capital Lease Obligation
=5382.39 + 849.454
=6231.844

Total Debt  (A: Dec. 2025 )
=Long-Term Debt & Capital Lease Obligation + Short-Term Debt & Capital Lease Obligation
=3399.585 + 1117.065
=4516.65

Fulltech Fiber Glass's annualized Effective Interest Rate on Debt % for the quarter that ended in Mar. 2026 is calculated as

Effective Interest Rate on Debt %
=-1  *  Interest Expense/( (Total Debt  (Q: Dec. 2025 )+Total Debt  (Q: Mar. 2026 ))/ count )
=-1  *  -142.596/( (4516.65+4998.666)/ 2 )
=-1  *  -142.596/4757.658
=3.00 %

where

Total Debt  (Q: Dec. 2025 )
=Long-Term Debt & Capital Lease Obligation + Short-Term Debt & Capital Lease Obligation
=3399.585 + 1117.065
=4516.65

Total Debt  (Q: Mar. 2026 )
=Long-Term Debt & Capital Lease Obligation + Short-Term Debt & Capital Lease Obligation
=4183.848 + 814.818
=4998.666

* 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.

In the calculation of annual Effective Interest Rate on Debt %, the Interest Expense of the last fiscal year and the average total debt over the fiscal year are used. In calculating the quarterly data, the Interest Expense data used here is four times the quarterly (Mar. 2026) interest expense data. Effective Interest Rate on Debt % is displayed in the 30-year financial page.

What does a Effective Interest Rate on Debt % of 3.00% mean?
Fulltech Fiber Glass (ROCO:1815) has a Effective Interest Rate on Debt % of 3.00% as of Mar. 2026. Effective interest rate on debt is the rate a company actually pays on its debt. View historical data on Fulltech Fiber Glass and its competitors.
Is Fulltech Fiber Glass' Effective Interest Rate on Debt % too high?
Fulltech Fiber Glass' current Effective Interest Rate on Debt % is 3.00%. Overall, Fulltech Fiber Glass has a GF Score™ of 66/100 and is considered Significantly Overvalued, reflecting its overall financial health beyond just this single metric.
How does Fulltech Fiber Glass' Effective Interest Rate on Debt % compare to APH and GLW?
Fulltech Fiber Glass' Effective Interest Rate on Debt % of 3.00% can be compared against companies in the Hardware industry. See the competitive comparison table and distribution chart on this page for a detailed peer-by-peer breakdown.
What is a good Effective Interest Rate on Debt % for a Hardware company?
A good Effective Interest Rate on Debt % depends on the Hardware industry context. However, Effective Interest Rate on Debt % 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 Effective Interest Rate on Debt % mean?
A high Effective Interest Rate on Debt % can signal that a stock is expensive relative to its fundamentals. Effective interest rate on debt is the rate a company actually pays on its debt. View historical data on Fulltech Fiber Glass and its competitors. Fulltech Fiber Glass's current Effective Interest Rate on Debt % is 3.00%. 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$40.44, compared to a current price of NT$60.30 — trading 49.1% above its estimated fair value. The current Effective Interest Rate on Debt % is 3.00%. Fulltech Fiber Glass' overall GF Score™ is 66/100 with 1 warning sign to review. Investors should evaluate multiple metrics — including profitability, growth, and financial strength — before making a decision.
How is Effective Interest Rate on Debt % calculated?
Effective Interest Rate on Debt % is calculated from a company's financial statements. For Fulltech Fiber Glass (ROCO:1815), the current Effective Interest Rate on Debt % is 3.00% 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 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$60.30 is trading 49.1% above its estimated GF Value™ of NT$40.44. GuruFocus considers Fulltech Fiber Glass to be Significantly Overvalued.

Key valuation signals for ROCO:1815:

  • Effective Interest Rate on Debt %: 3.00%
  • GF Value™: NT$40.44 vs. price of NT$60.30 (49.1% above fair value)
  • GF Score™: 66/100 with 1 warning sign

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 Business Description

Address No. 8, Dougong 16th Road, Yunlin County, Douliu, TWN
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.
66GF Score

Get the complete analysis for ROCO:1815

Effective Interest Rate on Debt % is just one metric. See GF Value™, 30-year financials, guru trades, warning signs, and more.

NT$60.30
Price
NT$40.44
GF Value