Formosa Optical Technology Co (ROCO:5312) ROE % Adjusted to Book Value: 4.33% (As of Dec. 2025)


ROCO:5312 Formosa Optical Technology Co Ltd ROCO:5312
82 GF Score
Price NT$88.70
GF Value NT$108.80
Valuation Modestly Undervalued
! 4 Warning Signs
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What is Formosa Optical Technology Co ROE % Adjusted to Book Value?

Formosa Optical Technology Co ROCO:5312 82 ROE % Adjusted to Book Value is 4.33% as of Dec. 2025. GuruFocus rates ROCO:5312 with a GF Score™ of 82/100 and a GF Value™ of NT$108.80 (Modestly Undervalued). The stock has 4 warning signs investors should review.

Formosa Optical Technology Co's ROE % for the quarter that ended in Dec. 2025 was 7.05%. Formosa Optical Technology Co's PB Ratio for the quarter that ended in Dec. 2025 was 1.63. Formosa Optical Technology Co's ROE % Adjusted to Book Value for the quarter that ended in Dec. 2025 was 4.33%.


Formosa Optical Technology Co ROE % Adjusted to Book Value Related Terms


Formosa Optical Technology Co ROE % Adjusted to Book Value Historical Data

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The historical data trend for Formosa Optical Technology Co's ROE % Adjusted to Book Value 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.

Formosa Optical Technology Co ROE % Adjusted to Book Value Chart

Formosa Optical Technology Co Annual Data
Trend Dec16 Dec17 Dec18 Dec19 Dec20 Dec21 Dec22 Dec23 Dec24 Dec25
ROE % Adjusted to Book Value
Get a 7-Day Free Trial Premium Member Only Premium Member Only 8.19 4.85 8.86 8.14 6.56

Formosa Optical Technology Co Quarterly Data
Mar21 Jun21 Sep21 Dec21 Mar22 Jun22 Sep22 Dec22 Mar23 Jun23 Sep23 Dec23 Mar24 Jun24 Sep24 Dec24 Mar25 Jun25 Sep25 Dec25
ROE % Adjusted to Book Value 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 5.95 5.99 1.94 10.80 4.33

ROCO:5312 vs ISRG, BDX, MDLN: ROE % Adjusted to Book Value Comparison

For the Medical Instruments & Supplies subindustry, Formosa Optical Technology Co's ROE % Adjusted to Book Value, along with its competitors' market caps and ROE % Adjusted to Book Value 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 ROE % Adjusted to Book Value vs Medical Devices & Instruments Industry

For the Medical Devices & Instruments industry and Healthcare sector, Formosa Optical Technology Co's ROE % Adjusted to Book Value distribution charts can be found below:

* The bar in red indicates where Formosa Optical Technology Co's ROE % Adjusted to Book Value falls into.


ROCO:5312
82GF Score
Formosa Optical Technology Co Ltd ROCO:5312
ROE % Adjusted to Book Value is just one metric. See GF Score™, valuation, warning signs, and more.
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Formosa Optical Technology Co ROE % Adjusted to Book Value Calculation

Formosa Optical Technology Co's ROE % Adjusted to Book Value for the fiscal year that ended in Dec. 2025 is calculated as

ROE % Adjusted to Book Value=ROE % / PB Ratio
=10.70% / 1.63
=6.56%

Formosa Optical Technology Co's ROE % Adjusted to Book Value for the quarter that ended in Dec. 2025 is calculated as

ROE % Adjusted to Book Value=ROE % / PB Ratio
=7.05% / 1.63
=4.33%

* 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 ROE % Adjusted to Book Value of 4.33% mean?
Formosa Optical Technology Co (ROCO:5312) has a ROE % Adjusted to Book Value of 4.33% as of Dec. 2025. Return on equity adjusted to book is the ratio of return on equity to price-book ratio. View historical data on Formosa Optical Technology Co and its competitors.
Is Formosa Optical Technology Co's ROE % Adjusted to Book Value too high?
Formosa Optical Technology Co's current ROE % Adjusted to Book Value is 4.33%. 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 ROE % Adjusted to Book Value compare to ISRG and BDX?
Formosa Optical Technology Co's ROE % Adjusted to Book Value of 4.33% can be compared against companies in the Medical Devices & Instruments industry. See the competitive comparison table and distribution chart on this page for a detailed peer-by-peer breakdown.
What is a good ROE % Adjusted to Book Value for a Medical Devices & Instruments company?
A good ROE % Adjusted to Book Value depends on the Medical Devices & Instruments industry context. However, ROE % Adjusted to Book Value 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 ROE % Adjusted to Book Value mean?
A high ROE % Adjusted to Book Value can signal that a stock is expensive relative to its fundamentals. Return on equity adjusted to book is the ratio of return on equity to price-book ratio. View historical data on Formosa Optical Technology Co and its competitors. Formosa Optical Technology Co's current ROE % Adjusted to Book Value is 4.33%. 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$108.80, compared to a current price of NT$88.70 — trading 18.5% below its estimated fair value. The current ROE % Adjusted to Book Value is 4.33%. 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 ROE % Adjusted to Book Value calculated?
ROE % Adjusted to Book Value is calculated from a company's financial statements. For Formosa Optical Technology Co (ROCO:5312), the current ROE % Adjusted to Book Value is 4.33% 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$88.70 is trading 18.5% below its estimated GF Value™ of NT$108.80. GuruFocus considers Formosa Optical Technology Co to be Modestly Undervalued.

Key valuation signals for ROCO:5312:

  • ROE % Adjusted to Book Value: 4.33%
  • GF Value™: NT$108.80 vs. price of NT$88.70 (18.5% below fair value)
  • GF Score™: 82/100 with 4 warning signs

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

Address No. 97, Xintai 5th Road, 16th Floor, Section 1, Xizhi District, New Taipei City, TWN
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

Get the complete analysis for ROCO:5312

ROE % Adjusted to Book Value is just one metric. See GF Value™, 30-year financials, guru trades, warning signs, and more.

NT$88.70
Price
NT$108.80
GF Value