A Comparative Performance Analysis of Sustainability Themed Indices in India: Markov Regime Switching Approach

Abstract

Sustainability Indices serve as a benchmark for the companies screened for their superior performance on environmental, social and governance (ESG) parameters. This article intends to compare the overall and regime-specific financial performance of socially responsible indices of the National Stock Exchange, Nifty100 ESG and Nifty100 ESG Enhanced with Nifty50 (representing the market) from 1 April 2012 to 31 March 2020. Overall comparative performance analysis of these indices is conducted using risk-adjusted return measures and volatility has been captured through the TGARCH model. Further, time duration has been decomposed into regimes using Markov Regime Switching Model and the comparison of indices has been undertaken in both regimes. Our findings suggest that there is no significant difference between the return performance of sustainability indices and market benchmark index in single time duration and sustainability indices performing marginally better in both the regimes identified. This implies that socially responsible investments in India are providing reasonable returns to investors without comprising non-financial objectives. For corporates, it is a win–win situation to focus on ESG parameters to attract capital from investors and deliver better corporate financial performance and hence increasing the potential of growth of socially responsible investing in India.