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Century Aluminum CoSTU:EY3 -0.03%66 Cyclically Adjusted PB Ratio is 4.95 as of Jul. 31, 2026, which is 367% above its 10-year median of 1.06. GuruFocus rates STU:EY3 with a GF Score™ of 66/100 and a GF Value™ of €19.34 (Significantly Overvalued). The stock has 7 warning signs investors should review. Among 1,535 Metals & Mining companies, Century Aluminum Co ranks worse than 80.91% on this metric.
The historical rank and industry rank for Century Aluminum Co's Cyclically Adjusted PB Ratio or its related term are showing as below:
STU:EY3'
s Cyclically Adjusted PB Ratio Range Over the Past 10 Years
Min: 0.26 Med: 1.06 Max: 7.71
Current: 5.17
During the past years, Century Aluminum Co's highest Cyclically Adjusted PB Ratio was 7.71. The lowest was 0.26. And the median was 1.06.
STU:EY3's Cyclically Adjusted PB Ratio is ranked worse than 80.91% of 1535
companies
in the Metals & Mining industry
Industry Median: 1.4
vs STU:EY3: 5.17
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.
Century Aluminum Co's adjusted book value per share data for the three months ended in Mar. 2026 was €10.058. 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 €7.48 for the trailing ten years ended in Mar. 2026.
Shiller PE for Stocks: The True Measure of Stock Valuation
Century Aluminum Co (STU:EY3) 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.
Century Aluminum Co Cyclically Adjusted PB Ratio Related Terms
Century Aluminum Co Cyclically Adjusted PB Ratio Historical Data
* Premium members only.
The historical data trend for Century Aluminum Co'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.
Century Aluminum Co Cyclically Adjusted PB Ratio Chart
STU:EY3 vs CSTM, KALU, AA: Cyclically Adjusted PB Ratio Comparison
For the Aluminum subindustry, Century Aluminum Co'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.
Century Aluminum Co Cyclically Adjusted PB Ratio vs Metals & Mining Industry
For the Metals & Mining industry and Basic Materials sector, Century Aluminum Co's Cyclically Adjusted PB Ratio distribution charts can be found below:
* The bar in red indicates where Century Aluminum Co's Cyclically Adjusted PB Ratio falls into.
Century Aluminum Co 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.
Century Aluminum Co'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 4.95 mean?
Century Aluminum Co (STU:EY3) has a Cyclically Adjusted PB Ratio of 4.95 as of Jul. 31, 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 Century Aluminum Co and its competitors. This is 367% above median its historical median of 1.06. Over the past decade, Century Aluminum Co's Cyclically Adjusted PB Ratio has ranged from 0.26 to 7.71. According to the industry distribution chart, Century Aluminum Co ranks #1242 out of 1535 companies in the Metals & Mining industry, placing it in the top 80.9%.
Is Century Aluminum Co's Cyclically Adjusted PB Ratio too high?
Century Aluminum Co's current Cyclically Adjusted PB Ratio of 4.95 is 367% above median its 10-year median of 1.06. Over the past 10 years, this metric has ranged from a low of 0.26 to a high of 7.71. The Metals & Mining industry median Cyclically Adjusted PB Ratio is 1.40. Century Aluminum Co's value of 4.95 is 253.6% above this industry median. Based on the distribution chart, Century Aluminum Co ranks #1242 out of 1535 companies in the Metals & Mining industry, which is in the bottom quartile relative to peers. Overall, Century Aluminum Co has a GF Score™ of 66/100 and is considered Significantly Overvalued, reflecting its overall financial health beyond just this single metric.
How does Century Aluminum Co's Cyclically Adjusted PB Ratio compare to CSTM and KALU?
According to the Metals & Mining industry distribution chart, Century Aluminum Co ranks #1242 out of 1535 companies for Cyclically Adjusted PB Ratio. This places Century Aluminum Co in the lower half of its industry. The industry median Cyclically Adjusted PB Ratio is 1.40. Century Aluminum Co's value of 4.95 is 253.6% above this benchmark. Historically, Century Aluminum Co's own Cyclically Adjusted PB Ratio has ranged from 0.26 to 7.71 over the past decade. While the company's 10-year median is 1.06 vs. the industry median of 1.40, Century Aluminum Co 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 Metals & Mining company?
The median Cyclically Adjusted PB Ratio among Metals & Mining companies is 1.40, based on 1,535 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. Century Aluminum Co's current Cyclically Adjusted PB Ratio of 4.95 is 253.6% 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 Century Aluminum Co and its competitors. For the Metals & Mining industry, the median Cyclically Adjusted PB Ratio is 1.40 — values significantly above this may indicate overvaluation, while values below may suggest a bargain or underlying issues. Century Aluminum Co's current Cyclically Adjusted PB Ratio is 4.95, which is 367% above median its own 10-year median of 1.06. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is Century Aluminum Co stock overvalued right now?
Based on GuruFocus' analysis, Century Aluminum Co (STU:EY3) is currently considered Significantly Overvalued. The stock's GF Value™ is €19.34, compared to a current price of €37.01 — trading 91.4% above its estimated fair value. The current Cyclically Adjusted PB Ratio is 4.95, which is 367% above median its 10-year median of 1.06 and 253.6% above the Metals & Mining industry median of 1.40. Century Aluminum Co's overall GF Score™ is 66/100 with 7 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 Century Aluminum Co (STU:EY3), the current Cyclically Adjusted PB Ratio is 4.95 as of Jul. 31, 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 Century Aluminum Co (STU:EY3) Overvalued in 2026?
Based on GuruFocus' analysis, Century Aluminum Co stock appears to be overvalued.
The current stock price of €37.01 is trading 91.4% above its estimated GF Value™ of €19.34.
GuruFocus considers Century Aluminum Co to be Significantly Overvalued.
Key valuation signals for STU:EY3:
Cyclically Adjusted PB Ratio: 4.95 (367% above median its 10-year median of 1.06)
GF Value™: €19.34 vs. price of €37.01 (91.4% above fair value)
Industry Position: 253.6% above the Metals & Mining median (#1242 of 1535)
No single metric tells the full story. See the STU:EY3 stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.
Century Aluminum Co produces primary aluminum standard grade and value-added products. The firm operates smelter facilities in the United States and Iceland. The majority of revenue is generated from Glencore, which agreed to purchase nearly all of Century Aluminum's North American production. The company produces high purity aluminum, standard-grade aluminum sow and tee bars, and value-added billet and foundry products. The company also owns a carbon anode production facility in the Netherlands.
66GF Score
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