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.
Turkiye Sise ve Cam Fabrikalari ASIST:SISE -1.78%90 Cyclically Adjusted PB Ratio is 1.62 as of Jul. 19, 2026, which is 15% below its 10-year median of 1.90. GuruFocus rates IST:SISE with a GF Score™ of 90/100 and a GF Value™ of ₺60.82 (Modestly Undervalued). The stock has 8 warning signs investors should review. Among 476 Conglomerates companies, Turkiye Sise ve Cam Fabrikalari AS ranks worse than 65.76% on this metric.
The historical rank and industry rank for Turkiye Sise ve Cam Fabrikalari AS's Cyclically Adjusted PB Ratio or its related term are showing as below:
IST:SISE'
s Cyclically Adjusted PB Ratio Range Over the Past 10 Years
Min: 0.08 Med: 1.9 Max: 6.74
Current: 1.62
During the past years, Turkiye Sise ve Cam Fabrikalari AS's highest Cyclically Adjusted PB Ratio was 6.74. The lowest was 0.08. And the median was 1.90.
IST:SISE's Cyclically Adjusted PB Ratio is ranked worse than 65.76% of 476
companies
in the Conglomerates industry
Industry Median: 1.06
vs IST:SISE: 1.62
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.
Turkiye Sise ve Cam Fabrikalari AS's adjusted book value per share data for the three months ended in Mar. 2026 was ₺85.934. 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 ₺27.23 for the trailing ten years ended in Mar. 2026.
Shiller PE for Stocks: The True Measure of Stock Valuation
Turkiye Sise ve Cam Fabrikalari AS (IST:SISE) 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.
Turkiye Sise ve Cam Fabrikalari AS Cyclically Adjusted PB Ratio Related Terms
Turkiye Sise ve Cam Fabrikalari AS Cyclically Adjusted PB 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.
Turkiye Sise ve Cam Fabrikalari AS Cyclically Adjusted PB Ratio Chart
IST:SISE vs HON, MMM: Cyclically Adjusted PB Ratio Comparison
For the Conglomerates subindustry, Turkiye Sise ve Cam Fabrikalari AS'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.
Turkiye Sise ve Cam Fabrikalari AS Cyclically Adjusted PB Ratio vs Conglomerates Industry
For the Conglomerates industry and Industrials sector, Turkiye Sise ve Cam Fabrikalari AS's Cyclically Adjusted PB Ratio distribution charts can be found below:
* The bar in red indicates where Turkiye Sise ve Cam Fabrikalari AS's Cyclically Adjusted PB Ratio falls into.
Turkiye Sise ve Cam Fabrikalari AS 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.
* 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 1.62 mean?
Turkiye Sise ve Cam Fabrikalari AS (IST:SISE) has a Cyclically Adjusted PB Ratio of 1.62 as of Jul. 19, 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 Turkiye Sise ve Cam Fabrikalari AS and its competitors. This is 15% below median its historical median of 1.90. Over the past decade, Turkiye Sise ve Cam Fabrikalari AS's Cyclically Adjusted PB Ratio has ranged from 0.08 to 6.74. According to the industry distribution chart, Turkiye Sise ve Cam Fabrikalari AS ranks #313 out of 476 companies in the Conglomerates industry, placing it in the top 65.8%.
Is Turkiye Sise ve Cam Fabrikalari AS's Cyclically Adjusted PB Ratio too high?
Turkiye Sise ve Cam Fabrikalari AS's current Cyclically Adjusted PB Ratio of 1.62 is 15% below median its 10-year median of 1.90. Over the past 10 years, this metric has ranged from a low of 0.08 to a high of 6.74. The Conglomerates industry median Cyclically Adjusted PB Ratio is 1.06. Turkiye Sise ve Cam Fabrikalari AS's value of 1.62 is 52.8% above this industry median. Based on the distribution chart, Turkiye Sise ve Cam Fabrikalari AS ranks #313 out of 476 companies in the Conglomerates industry, which is below the industry midpoint. Overall, Turkiye Sise ve Cam Fabrikalari AS has a GF Score™ of 90/100 and is considered Modestly Undervalued, reflecting its overall financial health beyond just this single metric.
How does Turkiye Sise ve Cam Fabrikalari AS's Cyclically Adjusted PB Ratio compare to HON and MMM?
According to the Conglomerates industry distribution chart, Turkiye Sise ve Cam Fabrikalari AS ranks #313 out of 476 companies for Cyclically Adjusted PB Ratio. This places Turkiye Sise ve Cam Fabrikalari AS in the lower half of its industry. The industry median Cyclically Adjusted PB Ratio is 1.06. Turkiye Sise ve Cam Fabrikalari AS's value of 1.62 is 52.8% above this benchmark. Historically, Turkiye Sise ve Cam Fabrikalari AS's own Cyclically Adjusted PB Ratio has ranged from 0.08 to 6.74 over the past decade. While the company's 10-year median is 1.90 vs. the industry median of 1.06, Turkiye Sise ve Cam Fabrikalari AS 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 Conglomerates company?
The median Cyclically Adjusted PB Ratio among Conglomerates companies is 1.06, based on 476 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. Turkiye Sise ve Cam Fabrikalari AS's current Cyclically Adjusted PB Ratio of 1.62 is 52.8% 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 Turkiye Sise ve Cam Fabrikalari AS and its competitors. For the Conglomerates industry, the median Cyclically Adjusted PB Ratio is 1.06 — values significantly above this may indicate overvaluation, while values below may suggest a bargain or underlying issues. Turkiye Sise ve Cam Fabrikalari AS's current Cyclically Adjusted PB Ratio is 1.62, which is 15% below median its own 10-year median of 1.90. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is Turkiye Sise ve Cam Fabrikalari AS stock overvalued right now?
Based on GuruFocus' analysis, Turkiye Sise ve Cam Fabrikalari AS (IST:SISE) is currently considered Modestly Undervalued. The stock's GF Value™ is ₺60.82, compared to a current price of ₺44.20 — trading 27.3% below its estimated fair value. The current Cyclically Adjusted PB Ratio is 1.62, which is 15% below median its 10-year median of 1.90 and 52.8% above the Conglomerates industry median of 1.06. Turkiye Sise ve Cam Fabrikalari AS's overall GF Score™ is 90/100 with 8 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 Turkiye Sise ve Cam Fabrikalari AS (IST:SISE), the current Cyclically Adjusted PB Ratio is 1.62 as of Jul. 19, 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 Turkiye Sise ve Cam Fabrikalari AS (IST:SISE) Overvalued in 2026?
Based on GuruFocus' analysis, Turkiye Sise ve Cam Fabrikalari AS stock appears to be undervalued.
The current stock price of ₺44.20 is trading 27.3% below its estimated GF Value™ of ₺60.82.
GuruFocus considers Turkiye Sise ve Cam Fabrikalari AS to be Modestly Undervalued.
Key valuation signals for IST:SISE:
Cyclically Adjusted PB Ratio: 1.62 (15% below median its 10-year median of 1.90)
GF Value™: ₺60.82 vs. price of ₺44.20 (27.3% below fair value)
Industry Position: 52.8% above the Conglomerates median (#313 of 476)
No single metric tells the full story. See the IST:SISE stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.
Turkiye Sise ve Cam Fabrikalari AS Business Description
Turkiye Sise ve Cam Fabrikalari AS is a holding company that, through its subsidiaries, manufactures and sells glass products, chemicals, and glass packaging. The firm's five segments are based on product type. The flat glass segment, which generates more revenue than any other segment, sells glass panes used in windows and automobile windshields. The glassware segment sells glass beverage bottles and crystal products. The other three segments are glass packaging, chemicals, and other, which consists primarily of services including insurance and the export and import of goods. The majority of revenue comes from Turkey.
90GF Score
Get the complete analysis for IST:SISE
Cyclically Adjusted PB 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
IST:SISE has been successfully added to your 
