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PT Indosat TbkISX:ISAT +14.21%89 Cyclically Adjusted PB Ratio is 2.51 as of Aug. 08, 2026, which is 30% above its 10-year median of 1.93. GuruFocus rates ISX:ISAT with a GF Score™ of 89/100 and a GF Value™ of Rp2,561.11 (Modestly Undervalued). The stock has 3 warning signs investors should review. Among 290 Telecommunication Services companies, PT Indosat Tbk ranks worse than 60% on this metric.
The historical rank and industry rank for PT Indosat Tbk's Cyclically Adjusted PB Ratio or its related term are showing as below:
ISX:ISAT'
s Cyclically Adjusted PB Ratio Range Over the Past 10 Years
Min: 0.41 Med: 1.93 Max: 3.86
Current: 2.23
During the past years, PT Indosat Tbk's highest Cyclically Adjusted PB Ratio was 3.86. The lowest was 0.41. And the median was 1.93.
ISX:ISAT's Cyclically Adjusted PB Ratio is ranked worse than 60% of 290
companies
in the Telecommunication Services industry
Industry Median: 1.715
vs ISX:ISAT: 2.23
The Shiller PE Ratio was first used by professor Robert Shiller. He uses E10 for his Shiller PE Ratio calculation. E10 is the average of the inflation adjusted earnings per share of a company over the past 10 years. The similar calculation is applied by GuruFocus to calculate the Cyclically Adjusted PB Ratio. The Cyclically Adjusted Book per Share is the average of the inflation adjusted book value per share of a company over the past 10 years.
PT Indosat Tbk's adjusted book value per share data for the three months ended in Jun. 2026 was Rp1,148.804. Add all the adjusted book value per share for the past 10 years together and divide the count will get our Cyclically Adjusted Book per Share, which is Rp864.01 for the trailing ten years ended in Jun. 2026.
Shiller PE for Stocks: The True Measure of Stock Valuation
PT Indosat Tbk (ISX:ISAT) Cyclically Adjusted PB Ratio Explanation
Compared with the regular PB Ratio, which works poorly for cyclical businesses, the Cyclically Adjusted PB Ratio smoothed out the fluctuations of book value during business cycles. Therefore it is more accurate in reflecting the valuation of the company.
If a company has consistent business performance, the Cyclically Adjusted PB Ratio should give similar results to regular PB Ratio.
PT Indosat Tbk Cyclically Adjusted PB Ratio Related Terms
PT Indosat Tbk Cyclically Adjusted PB Ratio Historical Data
* Premium members only.
The historical data trend for PT Indosat Tbk's Cyclically Adjusted PB Ratio 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.
ISX:ISAT vs VZ, TMUS, T: Cyclically Adjusted PB Ratio Comparison
For the Telecom Services subindustry, PT Indosat Tbk's Cyclically Adjusted PB Ratio, along with its competitors' market caps and Cyclically Adjusted 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.
PT Indosat Tbk Cyclically Adjusted PB Ratio vs Telecommunication Services Industry
For the Telecommunication Services industry and Communication Services sector, PT Indosat Tbk's Cyclically Adjusted PB Ratio distribution charts can be found below:
* The bar in red indicates where PT Indosat Tbk's Cyclically Adjusted PB Ratio falls into.
PT Indosat Tbk Cyclically Adjusted PB Ratio Calculation
Like the Shiller PE Ratio, the Cyclically Adjusted PB Ratio takes the Book Value per Share from the past 10 years, adjusts it for inflation, and then calculates the average. This average is then used for the P/B calculation. Because it considers this 10-year average, it's often referred to as the CAPB Ratio.
The Shiller PE Ratio was first used by professor Robert Shiller to measure the valuation of the overall market. The similar calculation is applied by GuruFocus to calculate the Cyclically Adjusted PB Ratio.
PT Indosat Tbk's Cyclically Adjusted PB Ratio for today is calculated as
* 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.
Please note that we use the CPI data of the country/region where the company is headquartered. If the CPI data for that country/region is not available, then we will use the CPI data of the United States as default.
What does a Cyclically Adjusted PB Ratio of 2.51 mean?
PT Indosat Tbk (ISX:ISAT) has a Cyclically Adjusted PB Ratio of 2.51 as of Aug. 08, 2026. Cyclically Adjusted PB Ratio is the ratio of share price to a company's inflation-adjusted book value per share over a 10-year period. View historical data on PT Indosat Tbk and its competitors. This is 30% above median its historical median of 1.93. Over the past decade, PT Indosat Tbk's Cyclically Adjusted PB Ratio has ranged from 0.41 to 3.86. According to the industry distribution chart, PT Indosat Tbk ranks #174 out of 290 companies in the Telecommunication Services industry, placing it in the top 60%.
Is PT Indosat Tbk's Cyclically Adjusted PB Ratio too high?
PT Indosat Tbk's current Cyclically Adjusted PB Ratio of 2.51 is 30% above median its 10-year median of 1.93. Over the past 10 years, this metric has ranged from a low of 0.41 to a high of 3.86. The Telecommunication Services industry median Cyclically Adjusted PB Ratio is 1.72. PT Indosat Tbk's value of 2.51 is 46.4% above this industry median. Based on the distribution chart, PT Indosat Tbk ranks #174 out of 290 companies in the Telecommunication Services industry, which is below the industry midpoint. Overall, PT Indosat Tbk has a GF Score™ of 89/100 and is considered Modestly Undervalued, reflecting its overall financial health beyond just this single metric.
How does PT Indosat Tbk's Cyclically Adjusted PB Ratio compare to VZ and TMUS?
According to the Telecommunication Services industry distribution chart, PT Indosat Tbk ranks #174 out of 290 companies for Cyclically Adjusted PB Ratio. This places PT Indosat Tbk in the lower half of its industry. The industry median Cyclically Adjusted PB Ratio is 1.72. PT Indosat Tbk's value of 2.51 is 46.4% above this benchmark. Historically, PT Indosat Tbk's own Cyclically Adjusted PB Ratio has ranged from 0.41 to 3.86 over the past decade. While the company's 10-year median is 1.93 vs. the industry median of 1.72, PT Indosat Tbk 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 Cyclically Adjusted PB Ratio for a Telecommunication Services company?
The median Cyclically Adjusted PB Ratio among Telecommunication Services companies is 1.72, based on 290 companies in the industry. Companies in the top quartile (top 25%) have a Cyclically Adjusted PB Ratio significantly above this median, while those in the bottom quartile fall well below. However, Cyclically Adjusted PB Ratio should not be evaluated in isolation — investors should consider it alongside profitability, growth, and financial strength metrics. PT Indosat Tbk's current Cyclically Adjusted PB Ratio of 2.51 is 46.4% 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 Cyclically Adjusted PB Ratio mean?
A high Cyclically Adjusted PB Ratio can signal that a stock is expensive relative to its fundamentals. Cyclically Adjusted PB Ratio is the ratio of share price to a company's inflation-adjusted book value per share over a 10-year period. View historical data on PT Indosat Tbk and its competitors. For the Telecommunication Services industry, the median Cyclically Adjusted PB Ratio is 1.72 — values significantly above this may indicate overvaluation, while values below may suggest a bargain or underlying issues. PT Indosat Tbk's current Cyclically Adjusted PB Ratio is 2.51, which is 30% above median its own 10-year median of 1.93. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is PT Indosat Tbk stock overvalued right now?
Based on GuruFocus' analysis, PT Indosat Tbk (ISX:ISAT) is currently considered Modestly Undervalued. The stock's GF Value™ is Rp2,561.11, compared to a current price of Rp2,170.00 — trading 15.3% below its estimated fair value. The current Cyclically Adjusted PB Ratio is 2.51, which is 30% above median its 10-year median of 1.93 and 46.4% above the Telecommunication Services industry median of 1.72. PT Indosat Tbk's overall GF Score™ is 89/100 with 3 warning signs to review. Investors should evaluate multiple metrics — including profitability, growth, and financial strength — before making a decision.
How is Cyclically Adjusted PB Ratio calculated?
Cyclically Adjusted PB Ratio is calculated from a company's financial statements. For PT Indosat Tbk (ISX:ISAT), the current Cyclically Adjusted PB Ratio is 2.51 as of Aug. 08, 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 Indosat Tbk (ISX:ISAT) Overvalued in 2026?
Based on GuruFocus' analysis, PT Indosat Tbk stock appears to be undervalued.
The current stock price of Rp2,170.00 is trading 15.3% below its estimated GF Value™ of Rp2,561.11.
GuruFocus considers PT Indosat Tbk to be Modestly Undervalued.
Key valuation signals for ISX:ISAT:
Cyclically Adjusted PB Ratio: 2.51 (30% above median its 10-year median of 1.93)
GF Value™: Rp2,561.11 vs. price of Rp2,170.00 (15.3% below fair value)
Industry Position: 46.4% above the Telecommunication Services median (#174 of 290)
No single metric tells the full story. See the ISX:ISAT stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.
PT Indosat Tbk is the provider of international long-distance and wireless services in Indonesia. The company operates under three reportable segments: Cellular, Midi and Fixed Telecommunication segment. Cellular, providing network coverage in all cities across Indonesia; fixed telecommunications, which provides services such as international calls and fixed lines; and multimedia interactive, data and internet, which offers products such as fixed connectivity, IT service and fixed Internet. The Cellular segment provides majority of the company's revenue.
89GF Score
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