Focused on building reliable datasets, financial models, and research tools for value-minded investors. Committed to turning complex data into practical guidance for value-investing and long-term wealth.
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.
TosohSTU:TOS +1.43%78 Shiller PE Ratio is 8.05 as of Sep. 16, 2026, which is 23% below its 10-year median of 10.39. GuruFocus rates STU:TOS with a GF Score™ of 78/100 and a GF Value™ of €12.41. The stock has 6 warning signs investors should review. Among 1,093 Chemicals companies, Tosoh ranks better than 81.79% on this metric.
As of today (2026-09-16), Tosoh's current share price is €14.20. Tosoh's E10 for the quarter that ended in Jun. 2026 was €1.76. Tosoh's Shiller PE Ratio for today is 8.05.
The historical rank and industry rank for Tosoh's Shiller PE Ratio or its related term are showing as below:
STU:TOS'
s Shiller PE Ratio Range Over the Past 10 Years
Min: 7.02 Med: 10.39 Max: 30.98
Current: 10.77
During the past years, Tosoh's highest Shiller PE Ratio was 30.98. The lowest was 7.02. And the median was 10.39.
STU:TOS's Shiller PE Ratio is ranked better than 81.79% of 1093
companies
in the Chemicals industry
Industry Median: 21.91
vs STU:TOS: 10.77
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.
Tosoh's adjusted earnings per share data for the three months ended in Jun. 2026 was €0.341. Add all the adjusted EPS for the past 10 years together and divide 10 will get our E10, which is €1.76 for the trailing ten years ended in Jun. 2026.
Shiller PE for Stocks: The True Measure of Stock Valuation
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.
Tosoh Shiller PE Ratio Related Terms
Tosoh Shiller PE Ratio Historical Data
* Premium members only.
The historical data trend for Tosoh's Shiller PE 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.
For the Chemicals subindustry, Tosoh'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.
Tosoh Shiller PE Ratio vs Chemicals Industry
For the Chemicals industry and Basic Materials sector, Tosoh's Shiller PE Ratio distribution charts can be found below:
* The bar in red indicates where Tosoh's Shiller PE Ratio falls into.
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.
Tosoh's Shiller PE 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.
Tosoh's E10 for the quarter that ended in Jun. 2026 is calculated as:
For example, Tosoh's adjusted earnings per share data for the three months ended in Jun. 2026 was:
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.
Tosoh (STU:TOS) has a Shiller PE Ratio of 8.05 as of Sep. 16, 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 Tosoh and its competitors. This is 23% below median its historical median of 10.39. Over the past decade, Tosoh's Shiller PE Ratio has ranged from 7.02 to 30.98. According to the industry distribution chart, Tosoh ranks #199 out of 1093 companies in the Chemicals industry, placing it in the top 18.2%.
Is Tosoh's Shiller PE Ratio too high?
Tosoh's current Shiller PE Ratio of 8.05 is 23% below median its 10-year median of 10.39. Over the past 10 years, this metric has ranged from a low of 7.02 to a high of 30.98. The Chemicals industry median Shiller PE Ratio is 21.91. Tosoh's value of 8.05 is 63.3% below this industry median. Based on the distribution chart, Tosoh ranks #199 out of 1093 companies in the Chemicals industry, which is in the top quartile — a strong position relative to peers. Overall, Tosoh has a GF Score™ of 78/100, reflecting its overall financial health beyond just this single metric.
How does Tosoh's Shiller PE Ratio compare to DOW?
According to the Chemicals industry distribution chart, Tosoh ranks #199 out of 1093 companies for Shiller PE Ratio. This places Tosoh in the top 18% of its industry — outperforming the majority of peers. The industry median Shiller PE Ratio is 21.91. Tosoh's value of 8.05 is 63.3% below this benchmark. Historically, Tosoh's own Shiller PE Ratio has ranged from 7.02 to 30.98 over the past decade. While the company's 10-year median is 10.39 vs. the industry median of 21.91, Tosoh 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 a Chemicals company?
The median Shiller PE Ratio among Chemicals companies is 21.91, based on 1,093 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. Tosoh's current Shiller PE Ratio of 8.05 is 63.3% 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 Tosoh and its competitors. For the Chemicals industry, the median Shiller PE Ratio is 21.91 — values significantly above this may indicate overvaluation, while values below may suggest a bargain or underlying issues. Tosoh's current Shiller PE Ratio is 8.05, which is 23% below median its own 10-year median of 10.39. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is Tosoh stock overvalued right now?
Tosoh (STU:TOS) has a current Shiller PE Ratio of 8.05. The stock's GF Value™ is €12.41, compared to a current price of €14.20 — trading 14.4% above its estimated fair value. The current Shiller PE Ratio is 8.05, which is 23% below median its 10-year median of 10.39 and 63.3% below the Chemicals industry median of 21.91. Tosoh's overall GF Score™ is 78/100 with 6 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 Tosoh (STU:TOS), the current Shiller PE Ratio is 8.05 as of Sep. 16, 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 Tosoh (STU:TOS) Overvalued in 2026?
Based on GuruFocus' analysis, Tosoh stock appears to be overvalued.
The current stock price of €14.20 is trading 14.4% above its estimated GF Value™ of €12.41.
Key valuation signals for STU:TOS:
Shiller PE Ratio: 8.05 (23% below median its 10-year median of 10.39)
GF Value™: €12.41 vs. price of €14.20 (14.4% above fair value)
Industry Position: 63.3% below the Chemicals median (#199 of 1093)
No single metric tells the full story. See the STU:TOS stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.
Tosoh Corp manufactures and sells a variety of petrochemicals, plastics, and chemical-based products. The firm organizes itself into five segments. The Chlor-alkali segment produces caustic soda and vinyl chloride monomer. The Engineering segment handles manufacturing, sales, construction, repair, and water treatment equipment. The Functional Products segment covers inorganic and organic fine chemicals, diagnostic and metrology products, and electronic materials such as fused silica and sputtering targets. The Petrochemical segment includes olefins like ethylene and propylene, polyethylene products, and resins. The Others segment comprises transportation, warehousing, inspection, analysis, and information processing services. It generates majority of its revenue from Chlor-alkali segment.
78GF Score
Get the complete analysis for STU:TOS
Shiller PE Ratio is just one metric. See GF Value™, 30-year financials, guru trades, warning signs, and more.
Quick Browse
Personalize
Premium Gurus 
Create New Portfolio
STU:TOS has been successfully added to your 
