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Dr. Charlie Tian is the founder and CEO of GuruFocus.com, a leading global investment research platform established in 2004. With a Ph.D. in physics, Dr. Tian transitioned from science to finance, applying a data-driven, disciplined approach to value investing.
The GF Value represents the intrinsic value of a stock, determined using GuruFocus' proprietary methodology. The GF Value Line on our stock Summary page provides an estimate of the stock’s fair-trading value.
To calculate this value, GuruFocus follows these steps:
We analyze historical correlations between the stock price and key business performance metrics, such as revenue, earnings, cash flow, and book value.
We identify the metrics that have the strongest historical correlation with the stock price and determine the historical multiples at which the stock has traded relative to these metrics.
Using these historical multiples as a reference, we estimate the stock's fair value while accounting for future business growth. Adjustments may be made based on the company’s past returns and growth trends.
GuruFocus believes that the GF Value Line represents the fair value at which a stock should trade. Stock prices typically fluctuate around this line. If a stock’s price is significantly above the GF Value Line, it is considered overvalued, and its future returns are likely to be lower. Conversely, if the stock price is significantly below the GF Value Line, its future returns are likely to be higher.
(1) These are some simple examples. You can access our GF Valuation filter under All-in-One Screener’s Fundamental tab, and Price-to-GF-Value filter under Valuation Ratio tab and set your own criteria.
(2) A sufficient margin of safety exists only when the stock is undervalued.
Possible Value Trap, Think Twice companies are those that appear significantly undervalued based on their Price-to-GF-Value ratio, but whose fundamentals show signs of weakness.
Indicators that a company may be a value trap include:
* Deteriorating Financial Health: A low Altman Z-scores indicates a higher risk of bankruptcy, or a low Piotroski F-Score. * Earnings Manipulation: A high Beneish M-score indicates potential earnings manipulation, raising concerns about the reliability of reported financials. * Stagnant or Declining Growth: Lack of revenue or earnings growth, or a recent slowdown, may signal limited future prospects.
Investors should conduct thorough due diligence, examining financial statements and growth indicators, to avoid falling into value traps.
PT Sona Topas Tourism Industry Tbk's Price-to-GF-Value for today is calculated as
Price-to-GF-Value
=
Share Price
/
GF Value
=
3150.00
/
2517.48
=
1.25
* 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.
PT Sona Topas Tourism Industry Tbk GF Value Related Terms
PT Sona Topas Tourism Industry Tbk (ISX:SONA) has a GF Value of Rp2,517.48 as of Aug. 18, 2026. GF Value represents the current intrinsic value of a stock derived from our exclusive method. View historical data on PT Sona Topas Tourism Industry Tbk and its competitors.
Is PT Sona Topas Tourism Industry Tbk's GF Value too high?
PT Sona Topas Tourism Industry Tbk's current GF Value is Rp2,517.48. Overall, PT Sona Topas Tourism Industry Tbk has a GF Score™ of 79/100 and is considered Modestly Overvalued, reflecting its overall financial health beyond just this single metric.
How does PT Sona Topas Tourism Industry Tbk's GF Value compare to BKNG and ABNB?
PT Sona Topas Tourism Industry Tbk's GF Value of Rp2,517.48 can be compared against companies in the Travel & Leisure industry. See the competitive comparison table and distribution chart on this page for a detailed peer-by-peer breakdown.
What is a good GF Value for a Travel & Leisure company?
A good GF Value depends on the Travel & Leisure industry context. However, GF 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 GF Value mean?
A high GF Value can signal that a stock is expensive relative to its fundamentals. GF Value represents the current intrinsic value of a stock derived from our exclusive method. View historical data on PT Sona Topas Tourism Industry Tbk and its competitors. PT Sona Topas Tourism Industry Tbk's current GF Value is Rp2,517.48. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is PT Sona Topas Tourism Industry Tbk stock overvalued right now?
Based on GuruFocus' analysis, PT Sona Topas Tourism Industry Tbk (ISX:SONA) is currently considered Modestly Overvalued. The stock's GF Value™ is Rp2,517.48, compared to a current price of Rp3,150.00 — trading 25.1% above its estimated fair value. The current GF Value is Rp2,517.48. PT Sona Topas Tourism Industry Tbk's overall GF Score™ is 79/100 with 3 warning signs to review. Investors should evaluate multiple metrics — including profitability, growth, and financial strength — before making a decision.
How is GF Value calculated?
GF Value is calculated from a company's financial statements. For PT Sona Topas Tourism Industry Tbk (ISX:SONA), the current GF Value is Rp2,517.48 as of Aug. 18, 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 PT Sona Topas Tourism Industry Tbk (ISX:SONA) Overvalued in 2026?
Based on GuruFocus' analysis, PT Sona Topas Tourism Industry Tbk stock appears to be overvalued.
The current stock price of Rp3,150.00 is trading 25.1% above its estimated GF Value™ of Rp2,517.48.
GuruFocus considers PT Sona Topas Tourism Industry Tbk to be Modestly Overvalued.
Key valuation signals for ISX:SONA:
GF Value: Rp2,517.48
GF Value™: Rp2,517.48 vs. price of Rp3,150.00 (25.1% above fair value)
No single metric tells the full story. See the ISX:SONA stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.
PT Sona Topas Tourism Industry Tbk provides domestic and international travel-related services in Indonesia. The company operates through two divisions: Travel and Travel Retail Shops. The company generates the majority of its revenue from the Travel Retail Shop division, which operates retail shops in Bali, Jakarta, Surabaya, Lombok, Medan, and Batam. Travel division includes Selling tours and travel tickets, especially to the domestic market, and handling of related documents and tours. Geographically, the company generates the majority of its revenue from Bali.
79GF Score
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