Thai Optical Group PCL (BKK:TOG) Beneish M-Score: -2.27 (As of Aug. 14, 2026)

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BKK:TOG Thai Optical Group PCL BKK:TOG
89 GF Score
Price ฿7.30
GF Value ฿9.76
Valuation Modestly Undervalued
! 5 Warning Signs
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What is Thai Optical Group PCL Beneish M-Score?

Thai Optical Group PCL BKK:TOG 89 Beneish M-Score is -2.27 as of Aug. 14, 2026. 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 767 Medical Devices & Instruments companies, Thai Optical Group PCL ranks worse than 71.32% on this metric.

The zones of discrimination for M-Score is as such:

An M-Score of equal or less than -1.78 suggests that the company is unlikely to be a manipulator.
An M-Score of greater than -1.78 signals that the company is likely to be a manipulator.

Good Sign:

Beneish M-Score -2.27 no higher than -1.78, which implies that the company is unlikely to be a manipulator.

The historical rank and industry rank for Thai Optical Group PCL's Beneish M-Score or its related term are showing as below:

BKK:TOG' s Beneish M-Score Range Over the Past 10 Years
Min: -3.33   Med: -2.54   Max: -2.24
Current: -2.27

During the past 13 years, the highest Beneish M-Score of Thai Optical Group PCL was -2.24. The lowest was -3.33. And the median was -2.54.


Thai Optical Group PCL Beneish M-Score Historical Data

* Premium members only.

The historical data trend for Thai Optical Group PCL's Beneish M-Score 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.

Thai Optical Group PCL Beneish M-Score Chart

Thai Optical Group PCL Annual Data
Trend Dec16 Dec17 Dec18 Dec19 Dec20 Dec21 Dec22 Dec23 Dec24 Dec25
Beneish M-Score
Get a 7-Day Free Trial Premium Member Only Premium Member Only -2.45 -2.63 -2.49 -2.79 -2.24

Thai Optical Group PCL Quarterly Data
Sep21 Dec21 Mar22 Jun22 Sep22 Dec22 Mar23 Jun23 Sep23 Dec23 Mar24 Jun24 Sep24 Dec24 Mar25 Jun25 Sep25 Dec25 Mar26 Jun26
Beneish M-Score 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 -2.73 -2.70 -2.24 -2.53 -2.27

BKK:TOG vs ISRG, BDX, MDLN: Beneish M-Score Comparison

For the Medical Instruments & Supplies subindustry, Thai Optical Group PCL's Beneish M-Score, along with its competitors' market caps and Beneish M-Score 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 Beneish M-Score vs Medical Devices & Instruments Industry

For the Medical Devices & Instruments industry and Healthcare sector, Thai Optical Group PCL's Beneish M-Score distribution charts can be found below:

* The bar in red indicates where Thai Optical Group PCL's Beneish M-Score falls into.


BKK:TOG
89GF Score
Thai Optical Group PCL BKK:TOG
Beneish M-Score is just one metric. See GF Score™, valuation, warning signs, and more.
View Full Analysis

Thai Optical Group PCL Beneish M-Score Calculation

The M-score was created by Professor Messod Beneish. Instead of measuring the bankruptcy risk (Altman Z-Score) or business trend (Piotroski F-Score), M-score can be used to detect the risk of earnings manipulation. This is the original research paper on M-score.

The M-Score Variables:

The M-score of Thai Optical Group PCL for today is based on a combination of the following eight different indices:

M=-4.84+0.92 * DSRI+0.528 * GMI+0.404 * AQI+0.892 * SGI+0.115 * DEPI
=-4.84+0.92 * 1.1896+0.528 * 1.0231+0.404 * 1.4356+0.892 * 1.0142+0.115 * 0.8548
-0.172 * SGAI+4.679 * TATA-0.327 * LVGI
-0.172 * 1.1508+4.679 * -0.02516-0.327 * 1.0092
=-2.27

* 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.

This Year (Jun26) TTM:Last Year (Jun25) TTM:
Total Receivables was ฿563 Mil.
Revenue was 837.011 + 901.161 + 930.244 + 838.22 = ฿3,507 Mil.
Gross Profit was 183.69 + 197.377 + 196.033 + 161.273 = ฿738 Mil.
Total Current Assets was ฿2,477 Mil.
Total Assets was ฿4,519 Mil.
Property, Plant and Equipment(Net PPE) was ฿1,858 Mil.
Depreciation, Depletion and Amortization(DDA) was ฿284 Mil.
Selling, General, & Admin. Expense(SGA) was ฿376 Mil.
Total Current Liabilities was ฿1,638 Mil.
Long-Term Debt & Capital Lease Obligation was ฿407 Mil.
Net Income was -31.551 + 102.757 + 113.661 + 80.862 = ฿266 Mil.
Non Operating Income was -140.668 + 9.803 + -4.102 + 4.559 = ฿-130 Mil.
Cash Flow from Operations was 102.796 + 175.899 + 59.052 + 172.101 = ฿510 Mil.
Total Receivables was ฿467 Mil.
Revenue was 871.423 + 898.727 + 829.852 + 857.599 = ฿3,458 Mil.
Gross Profit was 141.629 + 211.586 + 194.696 + 196.963 = ฿745 Mil.
Total Current Assets was ฿2,340 Mil.
Total Assets was ฿4,429 Mil.
Property, Plant and Equipment(Net PPE) was ฿1,963 Mil.
Depreciation, Depletion and Amortization(DDA) was ฿251 Mil.
Selling, General, & Admin. Expense(SGA) was ฿322 Mil.
Total Current Liabilities was ฿1,448 Mil.
Long-Term Debt & Capital Lease Obligation was ฿538 Mil.




1. DSRI = Days Sales in Receivables Index

Measured as the ratio of Revenue in Total Receivables in year t to year t-1.

A large increase in DSR could be indicative of revenue inflation.

DSRI=(Receivables_t / Revenue_t) / (Receivables_t-1 / Revenue_t-1)
=(563.408 / 3506.636) / (466.985 / 3457.601)
=0.160669 / 0.13506
=1.1896

2. GMI = Gross Margin Index

Measured as the ratio of gross margin in year t-1 to gross margin in year t.

Gross margin has deteriorated when this index is above 1. A firm with poorer prospects is more likely to manipulate earnings.

GMI=GrossMargin_t-1 / GrossMargin_t
=(GrossProfit_t-1 / Revenue_t-1) / (GrossProfit_t / Revenue_t)
=(744.874 / 3457.601) / (738.373 / 3506.636)
=0.215431 / 0.210564
=1.0231

3. AQI = Asset Quality Index

AQI is the ratio of asset quality in year t to year t-1.

Asset quality is measured as the ratio of non-current assets other than Property, Plant and Equipment to Total Assets.

AQI=(1 - (CurrentAssets_t + PPE_t) / TotalAssets_t) / (1 - (CurrentAssets_t-1 + PPE_t-1) / TotalAssets_t-1)
=(1 - (2477.104 + 1857.539) / 4519.431) / (1 - (2340.259 + 1962.885) / 4429.294)
=0.040887 / 0.028481
=1.4356

4. SGI = Sales Growth Index

Ratio of Revenue in year t to sales in year t-1.

Sales growth is not itself a measure of manipulation. However, growth companies are likely to find themselves under pressure to manipulate in order to keep up appearances.

SGI=Sales_t / Sales_t-1
=Revenue_t / Revenue_t-1
=3506.636 / 3457.601
=1.0142

5. DEPI = Depreciation Index

Measured as the ratio of the rate of Depreciation, Depletion and Amortization in year t-1 to the corresponding rate in year t.

DEPI greater than 1 indicates that assets are being depreciated at a slower rate. This suggests that the firm might be revising useful asset life assumptions upwards, or adopting a new method that is income friendly.

DEPI=(Depreciation_t-1 / (Depreciaton_t-1 + PPE_t-1)) / (Depreciation_t / (Depreciaton_t + PPE_t))
=(250.565 / (250.565 + 1962.885)) / (283.527 / (283.527 + 1857.539))
=0.113201 / 0.132423
=0.8548

Note: If the Depreciation, Depletion and Amortization data is not available, we assume that the depreciation rate is constant and set the Depreciation Index to 1.

6. SGAI = Sales, General and Administrative expenses Index

The ratio of Selling, General, & Admin. Expense(SGA) to Sales in year t relative to year t-1.

SGA expenses index > 1 means that the company is becoming less efficient in generate sales.

SGAI=(SGA_t / Sales_t) / (SGA_t-1 /Sales_t-1)
=(375.901 / 3506.636) / (322.063 / 3457.601)
=0.107197 / 0.093146
=1.1508

7. LVGI = Leverage Index

The ratio of total debt to Total Assets in year t relative to yeat t-1.

An LVGI > 1 indicates an increase in leverage

LVGI=((LTD_t + CurrentLiabilities_t) / TotalAssets_t) / ((LTD_t-1 + CurrentLiabilities_t-1) / TotalAssets_t-1)
=((406.835 + 1638.377) / 4519.431) / ((537.955 + 1448.13) / 4429.294)
=0.452537 / 0.448398
=1.0092

8. TATA = Total Accruals to Total Assets

Total accruals calculated as the change in working capital accounts other than cash less depreciation.

TATA=(IncomefromContinuingOperations_t - CashFlowsfromOperations_t) / TotalAssets_t
=(NetIncome_t - NonOperatingIncome_t - CashFlowsfromOperations_t) / TotalAssets_t
=(265.729 - -130.408 - 509.848) / 4519.431
=-0.02516

An M-Score of equal or less than -1.78 suggests that the company is unlikely to be a manipulator. An M-Score of greater than -1.78 signals that the company is likely to be a manipulator.

Thai Optical Group PCL has a M-score of -2.27 suggests that the company is unlikely to be a manipulator.

Frequently Asked Questions Learn more about Beneish M-Score →
What does a Beneish M-Score of -2.27 mean?
Thai Optical Group PCL (BKK:TOG) has a Beneish M-Score of -2.27 as of Aug. 14, 2026. The Beneish M-score measures the likelihood of earnings manipulation. View historical data on Thai Optical Group PCL and its competitors. According to the industry distribution chart, Thai Optical Group PCL ranks #547 out of 767 companies in the Medical Devices & Instruments industry, placing it in the top 71.3%.
Is Thai Optical Group PCL's Beneish M-Score too high?
Thai Optical Group PCL's current Beneish M-Score is -2.27. Based on the distribution chart, Thai Optical Group PCL ranks #547 out of 767 companies in the Medical Devices & Instruments industry, which is below 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 Beneish M-Score compare to ISRG and BDX?
According to the Medical Devices & Instruments industry distribution chart, Thai Optical Group PCL ranks #547 out of 767 companies for Beneish M-Score. This places Thai Optical Group PCL in the lower half of its industry. See the competitive comparison table and distribution chart on this page for a detailed peer-by-peer breakdown.
What is a good Beneish M-Score for a Medical Devices & Instruments company?
A good Beneish M-Score depends on the Medical Devices & Instruments industry context. However, Beneish M-Score 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 Beneish M-Score mean?
A high Beneish M-Score can signal that a stock is expensive relative to its fundamentals. The Beneish M-score measures the likelihood of earnings manipulation. View historical data on Thai Optical Group PCL and its competitors. Thai Optical Group PCL's current Beneish M-Score is -2.27. 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 Beneish M-Score is -2.27. 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 Beneish M-Score calculated?
Beneish M-Score is calculated from a company's financial statements. For Thai Optical Group PCL (BKK:TOG), the current Beneish M-Score is -2.27 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:

  • Beneish M-Score: -2.27
  • GF Value™: ฿9.76 vs. price of ฿7.30 (25.2% below fair value)
  • GF Score™: 89/100 with 5 warning signs

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 Business Description

Address 6 Bangbuathong-Suphanburi Road, 15/5 Moo, Laharn Sub-district, Bangbuathong, Nonthaburi, THA, 11110
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

Get the complete analysis for BKK:TOG

Beneish M-Score is just one metric. See GF Value™, 30-year financials, guru trades, warning signs, and more.

฿7.30
Price
฿9.76
GF Value