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Star Petroleum Refining PCLBKK:SPRC-R +1.22%66 Shiller PE Ratio is 14.38 as of Aug. 30, 2026, which is 69% above its 10-year median of 8.51. GuruFocus rates BKK:SPRC-R with a GF Score™ of 66/100 and a GF Value™ of ฿6.40 (Significantly Overvalued). The stock has 5 warning signs investors should review. Among 440 Oil & Gas companies, Star Petroleum Refining PCL ranks better than 67.27% on this metric.
The historical rank and industry rank for Star Petroleum Refining PCL's Shiller PE Ratio or its related term are showing as below:
BKK:SPRC-R'
s Shiller PE Ratio Range Over the Past 10 Years
Min: 5.33 Med: 8.51 Max: 13.4
Current: 13.06
During the past years, Star Petroleum Refining PCL's highest Shiller PE Ratio was 13.40. The lowest was 5.33. And the median was 8.51.
BKK:SPRC-R's Shiller PE Ratio is ranked better than 67.27% of 440
companies
in the Oil & Gas industry
Industry Median: 17.75
vs BKK:SPRC-R: 13.06
E10 is a concept invented by Prof. Robert Shiller, who uses E10 for his Shiller PE Ratio calculation. E10 is the average of the inflation adjusted earnings of a company over the past 10 years.
Star Petroleum Refining PCL's adjusted earnings per share data for the three months ended in Jun. 2026 was ฿1.600. Add all the adjusted EPS for the past 10 years together and divide 10 will get our E10, which is ฿0.89 for the trailing ten years ended in Jun. 2026.
Shiller PE for Stocks: The True Measure of Stock Valuation
Star Petroleum Refining PCL (BKK:SPRC-R) Shiller PE Ratio Explanation
Compared with the regular PE Ratio, which works poorly for cyclical businesses, the Shiller PE Ratio smoothed out the fluctuations of profit margins during business cycles. Therefore it is more accurate in reflecting the valuation of the company.
If a company has consistent business performance, the Shiller PE Ratio should give similar results to regular PE Ratio.
Compared with the PS Ratio, the Shiller PE Ratio makes the comparison between different industries more meaningful.
Be Aware
Shiller PE Ratio assumes that over the long term, businesses and profitability revert to their means. If a company's business model does not work in the future compared with the past, Shiller PE Ratio and PS Ratio will give false valuations.
Star Petroleum Refining PCL Shiller PE Ratio Related Terms
Star Petroleum Refining PCL Shiller PE Ratio Historical Data
* 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.
Star Petroleum Refining PCL Shiller PE Ratio Chart
BKK:SPRC-R vs MPC, VLO, PSX: Shiller PE Ratio Comparison
For the Oil & Gas Refining & Marketing subindustry, Star Petroleum Refining PCL's Shiller PE Ratio, along with its competitors' market caps and Shiller PE 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.
Star Petroleum Refining PCL Shiller PE Ratio vs Oil & Gas Industry
For the Oil & Gas industry and Energy sector, Star Petroleum Refining PCL's Shiller PE Ratio distribution charts can be found below:
* The bar in red indicates where Star Petroleum Refining PCL's Shiller PE Ratio falls into.
Star Petroleum Refining PCL Shiller PE Ratio Calculation
For Shiller PE Ratio, the earnings of the past 10 years are inflation-adjusted and averaged. The result is used for P/E calculation. Since it looks at the average over the last 10 years, the Shiller PE Ratio is also called PE10.
The Shiller PE Ratio was first used by professor Robert Shiller to measure the valuation of the overall market. The same calculation is applied here to individual companies.
* 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.
Add all the adjusted EPS together and divide 10 will get our E10.
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.
Star Petroleum Refining PCL (BKK:SPRC-R) has a Shiller PE Ratio of 14.38 as of Aug. 30, 2026. Shiller price-earnings ratio is the ratio of share price to a company's inflation-adjusted earnings over a 10-year period. View historical data on Star Petroleum Refining PCL and its competitors. This is 69% above median its historical median of 8.51. Over the past decade, Star Petroleum Refining PCL's Shiller PE Ratio has ranged from 5.33 to 13.40. According to the industry distribution chart, Star Petroleum Refining PCL ranks #144 out of 440 companies in the Oil & Gas industry, placing it in the top 32.7%.
Is Star Petroleum Refining PCL's Shiller PE Ratio too high?
Star Petroleum Refining PCL's current Shiller PE Ratio of 14.38 is 69% above median its 10-year median of 8.51. Over the past 10 years, this metric has ranged from a low of 5.33 to a high of 13.40. The Oil & Gas industry median Shiller PE Ratio is 17.75. Star Petroleum Refining PCL's value of 14.38 is 19% below this industry median. Based on the distribution chart, Star Petroleum Refining PCL ranks #144 out of 440 companies in the Oil & Gas industry, which is above the industry midpoint. Overall, Star Petroleum Refining PCL has a GF Score™ of 66/100 and is considered Significantly Overvalued, reflecting its overall financial health beyond just this single metric.
How does Star Petroleum Refining PCL's Shiller PE Ratio compare to MPC and VLO?
According to the Oil & Gas industry distribution chart, Star Petroleum Refining PCL ranks #144 out of 440 companies for Shiller PE Ratio. This puts Star Petroleum Refining PCL in the upper half of its industry. The industry median Shiller PE Ratio is 17.75. Star Petroleum Refining PCL's value of 14.38 is 19% below this benchmark. Historically, Star Petroleum Refining PCL's own Shiller PE Ratio has ranged from 5.33 to 13.40 over the past decade. While the company's 10-year median is 8.51 vs. the industry median of 17.75, Star Petroleum Refining 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 Shiller PE Ratio for an Oil & Gas company?
The median Shiller PE Ratio among Oil & Gas companies is 17.75, based on 440 companies in the industry. Companies in the top quartile (top 25%) have a Shiller PE Ratio significantly above this median, while those in the bottom quartile fall well below. However, Shiller PE Ratio should not be evaluated in isolation — investors should consider it alongside profitability, growth, and financial strength metrics. Star Petroleum Refining PCL's current Shiller PE Ratio of 14.38 is 19% 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 Shiller PE Ratio mean?
A high Shiller PE Ratio can signal that a stock is expensive relative to its fundamentals. Shiller price-earnings ratio is the ratio of share price to a company's inflation-adjusted earnings over a 10-year period. View historical data on Star Petroleum Refining PCL and its competitors. For the Oil & Gas industry, the median Shiller PE Ratio is 17.75 — values significantly above this may indicate overvaluation, while values below may suggest a bargain or underlying issues. Star Petroleum Refining PCL's current Shiller PE Ratio is 14.38, which is 69% above median its own 10-year median of 8.51. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is Star Petroleum Refining PCL stock overvalued right now?
Based on GuruFocus' analysis, Star Petroleum Refining PCL (BKK:SPRC-R) is currently considered Significantly Overvalued. The stock's GF Value™ is ฿6.40, compared to a current price of ฿12.80 — trading 100% above its estimated fair value. The current Shiller PE Ratio is 14.38, which is 69% above median its 10-year median of 8.51 and 19% below the Oil & Gas industry median of 17.75. Star Petroleum Refining PCL's overall GF Score™ is 66/100 with 5 warning signs to review. Investors should evaluate multiple metrics — including profitability, growth, and financial strength — before making a decision.
How is Shiller PE Ratio calculated?
Shiller PE Ratio is calculated from a company's financial statements. For Star Petroleum Refining PCL (BKK:SPRC-R), the current Shiller PE Ratio is 14.38 as of Aug. 30, 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 Star Petroleum Refining PCL (BKK:SPRC-R) Overvalued in 2026?
Based on GuruFocus' analysis, Star Petroleum Refining PCL stock appears to be overvalued.
The current stock price of ฿12.80 is trading 100% above its estimated GF Value™ of ฿6.40.
GuruFocus considers Star Petroleum Refining PCL to be Significantly Overvalued.
Key valuation signals for BKK:SPRC-R:
Shiller PE Ratio: 14.38 (69% above median its 10-year median of 8.51)
GF Value™: ฿6.40 vs. price of ฿12.80 (100% above fair value)
Industry Position: 19% below the Oil & Gas median (#144 of 440)
No single metric tells the full story. See the BKK:SPRC-R stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.
Star Petroleum Refining PCL operates petroleum refinery in Thailand. The company produces multiple petroleum products such as Liquefied Petroleum Gas, gasoline, jet fuel, diesel, fuel oil, asphalt, and others. Geographically the majority of its sales are conducted in Thailand. However, the company also produces petroleum products for international markets.
66GF Score
Get the complete analysis for BKK:SPRC-R
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