AUTHOR – Vivek Rathod
Introduction
Voltas Limited is a leading Indian engineering and consumer durables company and a member of the Tata Group. The company is best known for its air-conditioning and cooling solutions, along with electro-mechanical projects and engineering services across domestic and international markets.
Objective
To calculate the Beta of Voltas Limited with respect to Nifty 50 and examine its statistical significance in order to understand the systematic risk associated with Voltas shares.
Literature Review
Systematic Risk and Market Sensitivity of Indian Stocks
Prior studies show that beta, based on the Capital Asset Pricing Model (CAPM), is an effective measure of systematic risk, capturing how individual stock returns respond to market movements. Evidence from Indian markets indicates that stocks with beta values near one closely follow indices like the Nifty 50, while lower beta stocks are relatively defensive during market volatility.
Sectoral Analysis of Consumer Durable and Engineering Firms
Research on Indian consumer durable and engineering firms suggests moderate exposure to macroeconomic factors such as economic growth and consumer demand, resulting in medium beta values. While market movements significantly affect returns, firm-specific factors also play an important role, supporting the use of beta-based regression analysis for companies like Voltas Limited.
Data Collection
Historical data for Voltas Limited and Nifty 50 was collected from www.nseindia.com for the period 01-12-2024 to 30-11-2025.
Friday closing prices were considered.
Weekly returns were calculated.
Nifty 50 weekly returns were treated as the independent variable (X).
Voltas Limited weekly returns were treated as the dependent variable (Y).
A simple linear regression was conducted by regressing Y on X.
Data Analysis
Regression Equation
Voltas Limited (Y) = 0.92 × Nifty 50 (X) + 0.05
Regression Statistics
Beta (Slope coefficient) = 0.92
Intercept = 0.05
t-Statistic (Beta) = 4.86
p-value (Beta) = 0.00001
Number of observations (N) = 48
R² = 0.33
F-statistic = 23.62
Interpretation
The regression results indicate a positive and statistically significant relationship between the weekly returns of Nifty 50 and Voltas Limited.
A 1% increase in Nifty 50 returns leads to an approximate 0.92% increase in Voltas’ weekly returns, indicating that Voltas is slightly less volatile than the overall market.
The t-statistic of 4.86 and a very low p-value confirm that the beta coefficient is statistically significant, showing that market movements have a strong influence on Voltas’ stock returns.
The R² value of 0.33 suggests that 33% of the variation in Voltas’ returns is explained by movements in the Nifty 50, while the remaining 67% is influenced by company-specific factors such as seasonal demand for cooling products, raw material costs, competition, and execution of engineering projects.
The F-statistic further confirms that the overall regression model is statistically significant.
Conclusion
Voltas Limited has a beta of 0.92, which is slightly less than 1, indicating that the stock is moderately volatile compared to the overall market.
This implies that:
Voltas tends to move in line with market trends but with relatively lower volatility.
The stock may provide comparatively stable returns during market fluctuations.
It is suitable for investors with moderate risk appetite.
Voltas is appropriate for medium- to long-term investment strategies, especially during periods of steady economic growth.
References
- Bhaduri, S. N. and Durai, S. R. S. (2006)
‘Market volatility, market efficiency, and the beta coefficient: Evidence from the Indian stock market’,
Journal of Financial Management & Analysis, 19(1), pp. 1–15. - Mishra, A. K. and Rahman, M. L. (2018)
‘Stock market return and volatility spillovers: Evidence from Indian equity market’,
Journal of Economic Studies, 45(4), pp. 845–862.