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Beta is the sensitivity of the expected excess asset returns to the expected excess market returns. As of today (2026-07-27), Costain Group's Beta is 0.9221.
Costain Group (STU:5JY) Beta Explanation
Beta is a measure of the volatility, or systematic risk, of a security or a portfolio in comparison to the market as a whole. We usually compare beta to 1. A beta of 1 indicates that the security's price will move with the market. A beta of less than 1 means that the security will be less volatile than the market. A beta of greater than 1 indicates that the security's price will be more volatile than the market.
Beta is primarily used in the Capital Asset Pricing Model (CAPM) to calculate the Cost of Equity, which can be used in the calculation of WACC %. The formula of Cost of Equity is:
Cost of Equity = Risk-Free Rate of Return + Beta of Asset * (Expected Return of the Market - Risk-Free Rate of Return)
Costain Group Beta Related Terms
Costain Group Beta Historical Data
* Premium members only.
The historical data trend for Costain Group's Beta 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 Engineering & Construction subindustry, Costain Group's Beta, along with its competitors' market caps and Beta 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.
Costain Group Beta vs Construction Industry
For the Construction industry and Industrials sector, Costain Group's Beta distribution charts can be found below:
* The bar in red indicates where Costain Group's Beta falls into.
Beta is the sensitivity of the expected excess asset returns to the expected excess market returns. A stock's beta can be calculated by dividing the product of the covariance of the individual stock's returns and the market's returns by the variance of the market's returns over a specified period. Basically, GuruFocus uses the returns calculated over three-year period.
Costain Group (STU:5JY) has a Beta of 0.9221 as of Jul. 27, 2026. Beta is the sensitivity of the expected excess asset returns to the expected excess market returns. View historical data for Costain Group and its competitors.
Is Costain Group's Beta too high?
Costain Group's current Beta is 0.9221. Overall, Costain Group has a GF Score™ of 59/100 and is considered Significantly Overvalued, reflecting its overall financial health beyond just this single metric.
How does Costain Group's Beta compare to PWR and FIX?
Costain Group's Beta of 0.9221 can be compared against companies in the Construction industry. See the competitive comparison table and distribution chart on this page for a detailed peer-by-peer breakdown.
What is a good Beta for a Construction company?
A good Beta depends on the Construction industry context. However, Beta should not be evaluated in isolation — investors should consider it alongside profitability, growth, and financial strength metrics. Use the industry distribution chart on this page to see where any company falls relative to its peers.
What does a high Beta mean?
A high Beta can signal that a stock is expensive relative to its fundamentals. Beta is the sensitivity of the expected excess asset returns to the expected excess market returns. View historical data for Costain Group and its competitors. Costain Group's current Beta is 0.9221. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is Costain Group stock overvalued right now?
Based on GuruFocus' analysis, Costain Group (STU:5JY) is currently considered Significantly Overvalued. The stock's GF Value™ is €0.86, compared to a current price of €2.50 — trading 190.7% above its estimated fair value. The current Beta is 0.9221. Costain Group's overall GF Score™ is 59/100 with 5 warning signs to review. Investors should evaluate multiple metrics — including profitability, growth, and financial strength — before making a decision.
How is Beta calculated?
Beta is calculated from a company's financial statements. For Costain Group (STU:5JY), the current Beta is 0.9221 as of Jul. 27, 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 Costain Group (STU:5JY) Overvalued in 2026?
Based on GuruFocus' analysis, Costain Group stock appears to be overvalued.
The current stock price of €2.50 is trading 190.7% above its estimated GF Value™ of €0.86.
GuruFocus considers Costain Group to be Significantly Overvalued.
Key valuation signals for STU:5JY:
Beta: 0.9221
GF Value™: €0.86 vs. price of €2.50 (190.7% above fair value)
No single metric tells the full story. See the STU:5JY stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.
Costain Group PLC offers solutions and services. It provides engineering and technology solutions and advisory and development, design, management, project delivery, technology integration and asset optimization and support services to highways, nuclear, oil and gas, power, water sectors, rail. The company has two segments Transportation and Natural resources. The transportation segment covers highways, rail, and nuclear markets and the Natural resources segment comprises of water, power and oil and gas markets. Majority of revenue is from Transportation Segment.
59GF Score
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