Changes in the Relation Between ESG and Expected Returns According to ESG Awareness Levels

The COVID-19 pandemic has triggered an increased awareness and interest in ESG (Environmental, Social, Governance) among investors in the Korean market. Consequently, this study examines the changes in investors’ tastes and preferences regarding ESG before and after COVID-19 and analyzes how these changes affect the relationship between ESG and expected returns. The analysis revealed that, before COVID-19 the excess returns of portfolios constructed by buying stocks with high ESG scores and selling stocks with low ESG scores were not statistically significant. However, after COVID-19 the excess returns of these portfolios were significantly positive. This result suggests that prior to the pandemic, investors did not perceive ESG as a risk and showed no preference for ESG investments, leading to insignificant excess returns close to zero. In contrast, after the COVID-19 pandemic, increased interest in ESG resulted in a shift in investor preferences, leading to positive excess returns in ESG investments. The results remain consistent even after controlling for firm characteristics. Furthermore, when we examine the impact of each ESG component on expected returns separately, we find that heightened interest in environmental and social factors has a significant positive effect on expected returns.