Formosa Optical Technology CoROCO:5312 -0.44%82 Pretax Margin % is 7.40% as of Dec. 2025, which is 41% below its 10-year median of 12.55. GuruFocus rates ROCO:5312 with a GF Score™ of 82/100 and a GF Value™ of NT$108.71 (Modestly Undervalued). The stock has 4 warning signs investors should review. Among 815 Medical Devices & Instruments companies, Formosa Optical Technology Co ranks better than 71.17% on this metric.
The historical rank and industry rank for Formosa Optical Technology Co's Pretax Margin % or its related term are showing as below:
ROCO:5312'
s Pretax Margin % Range Over the Past 10 Years
Min: 6.24 Med: 12.55 Max: 16.45
Current: 11.55
ROCO:5312's Pretax Margin % is ranked better than 71.17% of 815
companies
in the Medical Devices & Instruments industry
Industry Median: 2.61
vs ROCO:5312: 11.55
Formosa Optical Technology Co (ROCO:5312) Pretax Margin % Explanation
The pretax margin, as know as pretax profit margin, is widely used to measure the operating efficiency of a company before deducting taxes.
The pretax margin is sometimes preferred over the net margin as tax expenditures can make profitability comparisons between companies misleading.
It is a useful tool to compare companies operating in the same sector and less effective when comparing companies from other sectors as each industry generally has different operating expenses and sales patterns.
The long term trend of the pretax margin is a good indicator of the competitiveness and health of the business.
Formosa Optical Technology Co Pretax Margin % Related Terms
Formosa Optical Technology Co Pretax Margin % Historical 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.
Formosa Optical Technology Co Pretax Margin % Chart
ROCO:5312 vs ISRG, BDX, MDLN: Pretax Margin % Comparison
For the Medical Instruments & Supplies subindustry, Formosa Optical Technology Co's Pretax Margin %, along with its competitors' market caps and Pretax 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.
Formosa Optical Technology Co Pretax Margin % vs Medical Devices & Instruments Industry
For the Medical Devices & Instruments industry and Healthcare sector, Formosa Optical Technology Co's Pretax Margin % distribution charts can be found below:
* The bar in red indicates where Formosa Optical Technology Co's Pretax Margin % falls into.
* 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.
Formosa Optical Technology Co (ROCO:5312) has a Pretax Margin % of 7.40% as of Dec. 2025. Pre-Tax margin is the ratio of total pre-tax income to net sales. View historical data on Formosa Optical Technology Co and its competitors. This is 41% below median its historical median of 12.55. Over the past decade, Formosa Optical Technology Co's Pretax Margin % has ranged from 6.24 to 16.45. According to the industry distribution chart, Formosa Optical Technology Co ranks #235 out of 815 companies in the Medical Devices & Instruments industry, placing it in the top 28.8%.
Is Formosa Optical Technology Co's Pretax Margin % too high?
Formosa Optical Technology Co's current Pretax Margin % of 7.40% is 41% below median its 10-year median of 12.55. Over the past 10 years, this metric has ranged from a low of 6.24 to a high of 16.45. The Medical Devices & Instruments industry median Pretax Margin % is 2.61. Formosa Optical Technology Co's value of 7.40% is 183.5% above this industry median. Based on the distribution chart, Formosa Optical Technology Co ranks #235 out of 815 companies in the Medical Devices & Instruments industry, which is above the industry midpoint. Overall, Formosa Optical Technology Co has a GF Score™ of 82/100 and is considered Modestly Undervalued, reflecting its overall financial health beyond just this single metric.
How does Formosa Optical Technology Co's Pretax Margin % compare to ISRG and BDX?
According to the Medical Devices & Instruments industry distribution chart, Formosa Optical Technology Co ranks #235 out of 815 companies for Pretax Margin %. This puts Formosa Optical Technology Co in the upper half of its industry. The industry median Pretax Margin % is 2.61. Formosa Optical Technology Co's value of 7.40% is 183.5% above this benchmark. Historically, Formosa Optical Technology Co's own Pretax Margin % has ranged from 6.24 to 16.45 over the past decade. While the company's 10-year median is 12.55 vs. the industry median of 2.61, Formosa Optical Technology Co 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 Pretax Margin % for a Medical Devices & Instruments company?
The median Pretax Margin % among Medical Devices & Instruments companies is 2.61, based on 815 companies in the industry. Companies in the top quartile (top 25%) have a Pretax Margin % significantly above this median, while those in the bottom quartile fall well below. However, Pretax Margin % should not be evaluated in isolation — investors should consider it alongside profitability, growth, and financial strength metrics. Formosa Optical Technology Co's current Pretax Margin % of 7.40% is 183.5% 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 Pretax Margin % mean?
A high Pretax Margin % can signal that a stock is expensive relative to its fundamentals. Pre-Tax margin is the ratio of total pre-tax income to net sales. View historical data on Formosa Optical Technology Co and its competitors. For the Medical Devices & Instruments industry, the median Pretax Margin % is 2.61 — values significantly above this may indicate overvaluation, while values below may suggest a bargain or underlying issues. Formosa Optical Technology Co's current Pretax Margin % is 7.40%, which is 41% below median its own 10-year median of 12.55. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is Formosa Optical Technology Co stock overvalued right now?
Based on GuruFocus' analysis, Formosa Optical Technology Co (ROCO:5312) is currently considered Modestly Undervalued. The stock's GF Value™ is NT$108.71, compared to a current price of NT$89.70 — trading 17.5% below its estimated fair value. The current Pretax Margin % is 7.40%, which is 41% below median its 10-year median of 12.55 and 183.5% above the Medical Devices & Instruments industry median of 2.61. Formosa Optical Technology Co's overall GF Score™ is 82/100 with 4 warning signs to review. Investors should evaluate multiple metrics — including profitability, growth, and financial strength — before making a decision.
How is Pretax Margin % calculated?
Pretax Margin % is calculated from a company's financial statements. For Formosa Optical Technology Co (ROCO:5312), the current Pretax Margin % is 7.40% 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 Formosa Optical Technology Co (ROCO:5312) Overvalued in 2026?
Based on GuruFocus' analysis, Formosa Optical Technology Co stock appears to be undervalued.
The current stock price of NT$89.70 is trading 17.5% below its estimated GF Value™ of NT$108.71.
GuruFocus considers Formosa Optical Technology Co to be Modestly Undervalued.
Key valuation signals for ROCO:5312:
Pretax Margin %: 7.40% (41% below median its 10-year median of 12.55)
GF Value™: NT$108.71 vs. price of NT$89.70 (17.5% below fair value)
Industry Position: 183.5% above the Medical Devices & Instruments median (#235 of 815)
No single metric tells the full story. See the ROCO:5312 stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.
Formosa Optical Technology Co Business Description
Formosa Optical Technology Co Ltd is mainly engaged in the eyewear business, including optometry services and the retail business selling contact lenses and eye drops. The Group mainly derives revenue from the business divisions of Formosa Optical Technology and Bo Wei Optical, with Formosa Optical Technology generating maximum revenue. The majority of revenue is derived from the sale of glasses. The Group generates the majority of its revenue from Taiwan.
82GF Score
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