Siamrajathanee PCLBKK:SO 88 Piotroski F-Score is 7 as of Jun. 27, 2026, which is 40% above its 10-year median of 5.00. GuruFocus rates BKK:SO with a GF Score™ of 88/100 and a GF Value™ of ฿5.68 (Modestly Undervalued). The stock has 5 warning signs investors should review. Among 1,063 Business Services companies, Siamrajathanee PCL ranks better than 89.09% on this metric.
Good Sign:
Piotroski F-Score is 7, indicates a very healthy situation.
The zones of discrimination were as such:
Good or high score = 7, 8, 9
Bad or low score = 0, 1, 2, 3
Siamrajathanee PCL has an F-score of 7. It is a good or high score, which usually indicates a very healthy situation.
The historical rank and industry rank for Siamrajathanee PCL's Piotroski F-Score or its related term are showing as below:
BKK:SO'
s Piotroski F-Score Range Over the Past 10 Years
Min: 4 Med: 5 Max: 8
Current: 7
During the past 11 years, the highest Piotroski F-Score of Siamrajathanee PCL was 8. The lowest was 4. And the median was 5.
The developer of the system is Joseph D. Piotroski is relatively unknown accounting professor who shuns publicity and rarely gives interviews.
He graduated from the University of Illinois with a B.S. in accounting in 1989, received an M.B.A. from Indiana University in 1994. Five years later, in 1999, after earning a Ph.D. in accounting from the University of Michigan, he became an associate professor of accounting at the University of Chicago.
He wanted to see if he can develop a system (using a simple nine-point scoring system) that can increase the returns of a strategy of investing in low price to book (referred to in the paper as high book to market) value companies.
What he found was something that exceeded his most optimistic expectations.
Buying only those companies that scored highest (8 or 9) on his nine-point scale, or F-Score as he called it, over the 20 year period from 1976 to 1996 led to an average out-performance over the market of 13.4%.
Even more impressive were the results of a strategy of investing in the highest F-Score companies (8 or 9) and shorting companies with the lowest F-Score (0 or 1).
Over the same period from 1976 to 1996 (20 years) this strategy led to an average yearly return of 23%, substantially outperforming the average S&P 500 index return of 15.83% over the same period.
Siamrajathanee PCL Piotroski F-Score Related Terms
Siamrajathanee PCL Piotroski F-Score Historical Data
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The historical data trend for Siamrajathanee PCL's Piotroski F-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.
BKK:SO vs CTAS, CPRT, GPN: Piotroski F-Score Comparison
For the Specialty Business Services subindustry, Siamrajathanee PCL's Piotroski F-Score, along with its competitors' market caps and Piotroski F-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.
Siamrajathanee PCL Piotroski F-Score vs Business Services Industry
For the Business Services industry and Industrials sector, Siamrajathanee PCL's Piotroski F-Score distribution charts can be found below:
* The bar in red indicates where Siamrajathanee PCL's Piotroski F-Score 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.
*Note: If the latest quarterly/semi-annual/annual total assets data is 0, then we will use previous quarterly/semi-annual/annual data for all the items in the balance sheet.
Profitability
Question 1. Return on Assets (ROA)
Net income before extraordinary items for the year divided by Total Assets at the beginning of the year.
Score 1 if positive, 0 if negative.
Siamrajathanee PCL's current Net Income (TTM) was 230.
==> Positive ==> Score 1.
Question 2. Cash Flow Return on Assets (CFROA)
Net cash flow from operating activities (operating cash flow) divided by Total Assets at the beginning of the year.
Siamrajathanee PCL's return on assets of this year was 0.0866305. Siamrajathanee PCL's return on assets of last year was 0.08231405.
==> This year is higher. ==> Score 1.
Question 4. Quality of Earnings (Accrual)
Compare Cash flow return on assets (2) to return on assets (1)
Siamrajathanee PCL's gearing of this year was 0.28189206. Siamrajathanee PCL's gearing of last year was 0.36437542.
==> This year is lower or equal to last year. ==> Score 1.
Question 6. Change in Working Capital (Liquidity)
Compare this year's current ratio (current assets divided by current liabilities) to last year's current ratio.
Score 1 if this year's current ratio is higher, 0 if it's lower
Siamrajathanee PCL's current ratio of this year was 1.10333489. Siamrajathanee PCL's current ratio of last year was 1.07924718.
==> This year's current ratio is higher. ==> Score 1.
Question 7. Change in Shares in Issue
Compare the number of shares in issue this year, to the number in issue last year.
Score 0 if there is larger number of shares in issue this year, 1 otherwise.
Siamrajathanee PCL's number of shares in issue this year was 476.107. Siamrajathanee PCL's number of shares in issue last year was 476.107.
==> There is smaller number of shares in issue this year, or the same. ==> Score 1.
Efficiency
Question 8. Change in Gross Margin
Compare this year's gross margin (Gross Profit divided by sales) to last year's.
Score 1 if this year's gross margin is higher, 0 if it's lower.
Siamrajathanee PCL's gross margin of this year was 0.15509925. Siamrajathanee PCL's gross margin of last year was 0.16216301.
==> Last year's gross margin is higher ==> Score 0.
Question 9. Change in asset turnover
Compare this year's asset turnover (total sales for the year divided by total assets at the beginning of the year) to last year's asset turnover ratio.
Score 1 if this year's asset turnover ratio is higher, 0 if it's lower
Siamrajathanee PCL's asset turnover of this year was 1.07751858. Siamrajathanee PCL's asset turnover of last year was 1.23913297.
==> Last year's asset turnover is higher ==> Score 0.
Evaluation
Piotroski F-Score
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7
Good or high score = 7, 8, 9
Bad or low score = 0, 1, 2, 3
Siamrajathanee PCL has an F-score of 7. It is a good or high score, which usually indicates a very healthy situation.
Siamrajathanee PCL (BKK:SO) has a Piotroski F-Score of 7 as of Jun. 27, 2026. The Piotroski F-score grades a company's business operating strength from 0-9. View historical data on Siamrajathanee PCL and its competitors. This is 40% above median its historical median of 5.00. Over the past decade, Siamrajathanee PCL's Piotroski F-Score has ranged from 4.00 to 8.00. According to the industry distribution chart, Siamrajathanee PCL ranks #116 out of 1063 companies in the Business Services industry, placing it in the top 10.9%.
Is Siamrajathanee PCL's Piotroski F-Score too high?
Siamrajathanee PCL's current Piotroski F-Score of 7 is 40% above median its 10-year median of 5.00. Over the past 10 years, this metric has ranged from a low of 4.00 to a high of 8.00. The Business Services industry median Piotroski F-Score is 5.00. Siamrajathanee PCL's value of 7 is 40% above this industry median. Based on the distribution chart, Siamrajathanee PCL ranks #116 out of 1063 companies in the Business Services industry, which is in the top quartile — a strong position relative to peers. Overall, Siamrajathanee PCL has a GF Score™ of 88/100 and is considered Modestly Undervalued, reflecting its overall financial health beyond just this single metric.
How does Siamrajathanee PCL's Piotroski F-Score compare to CTAS and CPRT?
According to the Business Services industry distribution chart, Siamrajathanee PCL ranks #116 out of 1063 companies for Piotroski F-Score. This places Siamrajathanee PCL in the top 11% of its industry — outperforming the majority of peers. The industry median Piotroski F-Score is 5.00. Siamrajathanee PCL's value of 7 is 40% above this benchmark. Historically, Siamrajathanee PCL's own Piotroski F-Score has ranged from 4.00 to 8.00 over the past decade. While the company's 10-year median is 5.00 vs. the industry median of 5.00, Siamrajathanee PCL 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 Piotroski F-Score for a Business Services company?
The median Piotroski F-Score among Business Services companies is 5.00, based on 1,063 companies in the industry. Companies in the top quartile (top 25%) have a Piotroski F-Score significantly above this median, while those in the bottom quartile fall well below. However, Piotroski F-Score should not be evaluated in isolation — investors should consider it alongside profitability, growth, and financial strength metrics. Siamrajathanee PCL's current Piotroski F-Score of 7 is 40% 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 Piotroski F-Score mean?
A high Piotroski F-Score can signal that a stock is expensive relative to its fundamentals. The Piotroski F-score grades a company's business operating strength from 0-9. View historical data on Siamrajathanee PCL and its competitors. For the Business Services industry, the median Piotroski F-Score is 5.00 — values significantly above this may indicate overvaluation, while values below may suggest a bargain or underlying issues. Siamrajathanee PCL's current Piotroski F-Score is 7, which is 40% above median its own 10-year median of 5.00. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is Siamrajathanee PCL stock overvalued right now?
Based on GuruFocus' analysis, Siamrajathanee PCL (BKK:SO) is currently considered Modestly Undervalued. The stock's GF Value™ is ฿5.68, compared to a current price of ฿4.64 — trading 18.3% below its estimated fair value. The current Piotroski F-Score is 7, which is 40% above median its 10-year median of 5.00 and 40% above the Business Services industry median of 5.00. Siamrajathanee PCL's overall GF Score™ is 88/100 with 5 warning signs to review. Investors should evaluate multiple metrics — including profitability, growth, and financial strength — before making a decision.
How is Piotroski F-Score calculated?
Piotroski F-Score is calculated from a company's financial statements. For Siamrajathanee PCL (BKK:SO), the current Piotroski F-Score is 7 as of Jun. 27, 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 Siamrajathanee PCL (BKK:SO) Overvalued in 2026?
Based on GuruFocus' analysis, Siamrajathanee PCL stock appears to be undervalued.
The current stock price of ฿4.64 is trading 18.3% below its estimated GF Value™ of ฿5.68.
GuruFocus considers Siamrajathanee PCL to be Modestly Undervalued.
Key valuation signals for BKK:SO:
Piotroski F-Score: 7 (40% above median its 10-year median of 5.00)
GF Value™: ฿5.68 vs. price of ฿4.64 (18.3% below fair value)
Industry Position: 40% above the Business Services median (#116 of 1063)
No single metric tells the full story. See the BKK:SO stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.
Siamrajathanee PCL is an outsourcing services company in Thailand for both the government and private sectors. It is principally engaged in providing outsourcing services and vehicle operating lease services. The company, along with its subsidiaries, is organized into business units based on its products and services and has the following reportable segments: the Outsourcing service segment, the Rental service segment, and others. A majority of its revenue is generated from the Outsourcing service segment, which provides services like Workforce management, corporate car rental, landscape maintenance, and industrial waste disposal. Geographically, the group operates only in Thailand.
88GF Score
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