Introduction:
Voltamp Transformers Limited, established in 1961 and headquartered in Vadodara, Gujarat, is a premier manufacturer of electrical transformers in India. The company specializes in a wide range of oil-filled and dry-type power and distribution transformers, catering to diverse sectors including Power, Steel, Cement, Oil & Gas, and Green Energy. With over six decades of expertise and more than 80,000 installations globally, Voltamp is a debt-free, professionally managed entity listed on the BSE and NSE. It is recognized for its strong focus on energy-efficient products and maintains a significant market share in the Indian transformer industry.
Objective:
The primary objective of this study is to analyze the systematic risk of Voltamp Transformers Limited relative to the broader market (Nifty 50 Index). Specifically, the study aims to:
- Calculate the Beta (β) coefficient of Voltamp Transformers Ltd.
- Determine the stock’s volatility compared to the market benchmark.
- Assess whether the stock acts as an aggressive or defensive investment during the analyzed period.
Literature Review:
- Modern Portfolio Theory (MPT): Suggests that investors can reduce overall portfolio variance by including low-beta (defensive) stocks like Voltamp Transformers.
- Systematic vs. Unsystematic Risk: Systematic risk (Market risk) is the risk inherent to the entire market and cannot be diversified. Unsystematic risk (Company-specific risk), which appears to be dominant for Voltamp, can be mitigated through a well-diversified portfolio.
Data Collection:
The data for this analysis was sourced from the provided financial dataset covering the period from December 1, 2024, to November 30, 2025.
- Stock: Voltamp Transformers Limited (Closing Prices).
- Market Index: Nifty 50 (Closing Prices).
- Frequency: Weekly closing prices were used to calculate weekly returns.
- Observation Count: 51 weekly data points.
- Variables:
- Independent Variable (X): Weekly Returns of NIFTY 50 Index.
- Dependent Variable (Y): Weekly Returns of VOLTAMP.
Data Analysis:
· Regression Equation:
Voltamp Transformers (Y) = -0.0751 + 0.0499 * Nifty 50 (X)
· Key Statistics:
o T-Stat: 1.5634
o No. of Observations (n): 51
o R^2: 0.0475 (4.75%)
o F-Stat: 2.4444
o P-Value: 0.1243
· Interpretation:
o The regression equation describes the relationship between the Weekly Return of Nifty 50 (X) and the share price of Voltamp Transformers Limited (Y). The positive coefficient of X indicates a direct (though weak) relationship.
o If the weekly price of Nifty 50 rises by 1%, the weekly price of Voltamp Transformers Limited is expected to rise by only 0.05%, and vice versa.
o The t-stat for Beta is 1.5634, and the p-value is 0.1243. Since the p-value is greater than 0.05, the Beta (β) is not statistically significant at the 5% level. This suggests that the market index is not a strong predictor of this stock’s weekly returns.
o The number of observations is 51, R^2 is 0.0475, meaning that only 4.75% of the variation in the Weekly Return of Voltamp is explained by the Nifty 50 Index. The remaining 95.25% is attributed to unsystematic factors such as company fundamentals, earnings reports, and industry-specific developments.
o The F-stat is 2.4444 with a significance p-value of 0.1243, indicating that the overall regression model is not statistically significant at the 5% level.
Conclusion:
Since Beta (β) = 0.0499, which is significantly less than 1, the stock is classified as highly defensive, and one must invest in this company for the long term if Nifty is expected to rise.
References:
- Sharpe (1964): Foundational CAPM theory explaining Beta and market risk.
- Bodie, Kane & Marcus (2021): Discussion on aggressive vs. defensive stocks based on Beta values.
- Ross, Westerfield & Jaffe (2019): Insights into Beta interpretation for corporate finance and investment strategy.