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Thai Optical Group PCLBKK:TOG 89 PB Ratio is 1.45 as of Aug. 14, 2026, which is 22% below its 10-year median of 1.86. GuruFocus rates BKK:TOG with a GF Score™ of 89/100 and a GF Value™ of ฿9.76 (Modestly Undervalued). The stock has 5 warning signs investors should review. Among 783 Medical Devices & Instruments companies, Thai Optical Group PCL ranks better than 67.05% on this metric.
The historical rank and industry rank for Thai Optical Group PCL's PB Ratio or its related term are showing as below:
BKK:TOG'
s PB Ratio Range Over the Past 10 Years
Min: 0.81 Med: 1.86 Max: 2.91
Current: 1.45
During the past 13 years, Thai Optical Group PCL's highest PB Ratio was 2.91. The lowest was 0.81. And the median was 1.86.
BKK:TOG's PB Ratio is ranked better than 67.05% of 783
companies
in the Medical Devices & Instruments industry
Industry Median: 2.13
vs BKK:TOG: 1.45
During the past 12 months, Thai Optical Group PCL's average Book Value Per Share Growth Rate was 1.50% per year.
During the past 3 years, the average Book Value Per Share Growth Rate was 5.20% per year.
During the past 5 years, the average Book Value Per Share Growth Rate was 6.30% per year.
During the past 10 years, the average Book Value Per Share Growth Rate was 3.20% per year.
During the past 13 years, the highest 3-Year average Book Value Per Share Growth Rate of Thai Optical Group PCL was 12.20% per year. The lowest was -2.30% per year. And the median was 3.00% per year.
The PB Ratio works the best for the businesses that earn most of their profit from their assets, e.g. banks and insurance companies.
Be Aware
Some businesses have very light assets, such as software companies or insurance agencies. The PB Ratio does not work well for these companies. Some companies even have negative equity, so the PB Ratio cannot be applied to them.
* 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.
For the Medical Instruments & Supplies subindustry, Thai Optical Group PCL's PB Ratio, along with its competitors' market caps and PB Ratio 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 Optical Group PCL PB Ratio vs Medical Devices & Instruments Industry
For the Medical Devices & Instruments industry and Healthcare sector, Thai Optical Group PCL's PB Ratio distribution charts can be found below:
* The bar in red indicates where Thai Optical Group PCL's PB Ratio falls into.
The PB Ratio, or Price-to-Book ratio, or Price/Book, is a financial ratio used to compare a company's market price to its Book Value per Share. It is a ratio widely used to value stocks.
* 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.
It can also be calculated from the numbers for the whole company:
A closely related ratio is called Price-to-Tangible-Book. The difference between Price-to-Tangible-Book and PB Ratio is that book value other than intangibles are used in the calculation.
Thai Optical Group PCL (BKK:TOG) has a PB Ratio of 1.45 as of Aug. 14, 2026. Price-to-Book ratio is the ratio of share price to a company's book value per share. View historical data on Thai Optical Group PCL and its competitors. This is 22% below median its historical median of 1.86. Over the past decade, Thai Optical Group PCL's PB Ratio has ranged from 0.81 to 2.91. According to the industry distribution chart, Thai Optical Group PCL ranks #258 out of 783 companies in the Medical Devices & Instruments industry, placing it in the top 33%.
Is Thai Optical Group PCL's PB Ratio too high?
Thai Optical Group PCL's current PB Ratio of 1.45 is 22% below median its 10-year median of 1.86. Over the past 10 years, this metric has ranged from a low of 0.81 to a high of 2.91. The Medical Devices & Instruments industry median PB Ratio is 2.13. Thai Optical Group PCL's value of 1.45 is 31.9% below this industry median. Based on the distribution chart, Thai Optical Group PCL ranks #258 out of 783 companies in the Medical Devices & Instruments industry, which is above the industry midpoint. Overall, Thai Optical Group PCL has a GF Score™ of 89/100 and is considered Modestly Undervalued, reflecting its overall financial health beyond just this single metric.
How does Thai Optical Group PCL's PB Ratio compare to ISRG and BDX?
According to the Medical Devices & Instruments industry distribution chart, Thai Optical Group PCL ranks #258 out of 783 companies for PB Ratio. This puts Thai Optical Group PCL in the upper half of its industry. The industry median PB Ratio is 2.13. Thai Optical Group PCL's value of 1.45 is 31.9% below this benchmark. Historically, Thai Optical Group PCL's own PB Ratio has ranged from 0.81 to 2.91 over the past decade. While the company's 10-year median is 1.86 vs. the industry median of 2.13, Thai Optical Group 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 PB Ratio for a Medical Devices & Instruments company?
The median PB Ratio among Medical Devices & Instruments companies is 2.13, based on 783 companies in the industry. Companies in the top quartile (top 25%) have a PB Ratio significantly above this median, while those in the bottom quartile fall well below. However, PB Ratio should not be evaluated in isolation — investors should consider it alongside profitability, growth, and financial strength metrics. Thai Optical Group PCL's current PB Ratio of 1.45 is 31.9% 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 PB Ratio mean?
A high PB Ratio can signal that a stock is expensive relative to its fundamentals. Price-to-Book ratio is the ratio of share price to a company's book value per share. View historical data on Thai Optical Group PCL and its competitors. For the Medical Devices & Instruments industry, the median PB Ratio is 2.13 — values significantly above this may indicate overvaluation, while values below may suggest a bargain or underlying issues. Thai Optical Group PCL's current PB Ratio is 1.45, which is 22% below median its own 10-year median of 1.86. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is Thai Optical Group PCL stock overvalued right now?
Based on GuruFocus' analysis, Thai Optical Group PCL (BKK:TOG) is currently considered Modestly Undervalued. The stock's GF Value™ is ฿9.76, compared to a current price of ฿7.30 — trading 25.2% below its estimated fair value. The current PB Ratio is 1.45, which is 22% below median its 10-year median of 1.86 and 31.9% below the Medical Devices & Instruments industry median of 2.13. Thai Optical Group PCL's overall GF Score™ is 89/100 with 5 warning signs to review. Investors should evaluate multiple metrics — including profitability, growth, and financial strength — before making a decision.
How is PB Ratio calculated?
PB Ratio is calculated from a company's financial statements. For Thai Optical Group PCL (BKK:TOG), the current PB Ratio is 1.45 as of Aug. 14, 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 Optical Group PCL (BKK:TOG) Overvalued in 2026?
Based on GuruFocus' analysis, Thai Optical Group PCL stock appears to be undervalued.
The current stock price of ฿7.30 is trading 25.2% below its estimated GF Value™ of ฿9.76.
GuruFocus considers Thai Optical Group PCL to be Modestly Undervalued.
Key valuation signals for BKK:TOG:
PB Ratio: 1.45 (22% below median its 10-year median of 1.86)
GF Value™: ฿9.76 vs. price of ฿7.30 (25.2% below fair value)
Industry Position: 31.9% below the Medical Devices & Instruments median (#258 of 783)
No single metric tells the full story. See the BKK:TOG stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.
Thai Optical Group PCL is engaged in the manufacturing and distribution of plastic lenses and related products. The company's products include Organic lenses, Mineral lenses, and Prescription Lenses. It has two reporting segments: Plastic and glass lens, which produce and sell optical lenses; Other products and services which are the sale of the glass mold, trading goods purchased for resale, glasses assembly services, and surface treatments. The majority of the revenue is generated from the plastic and glass lens segment. The company also operates in Europe, Australia, Asia and Pacific, America, Africa, and the Middle East. The majority of revenue is from America.
89GF Score
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