Impact of ESG (Environmental, Social, Governance) on the Financial Performance of US Firms: A Sector Based Approach

Tanvir Bhuiyan

Using a unique sector-based approach, this research delves into the intricate relationship between ESG (Environment, Social, and Governance) scores and various financial performance indicators of US firms. Previous studies have yielded mixed results, with positive, negative, and neutral associations, leading to inconclusive findings. This study aims to address this issue by focusing on three key aspects: the importance of sectoral affiliation, the selection of financial performance metrics, and the categorisation of firms based on their ESG rankings (high, medium, and low). A significant limitation in prior research is the lack of sector-specific analysis, potentially introducing biases in the observed impact of ESG on financial performance. Moreover, medium-ESG firms are often overlooked in comparative studies, limiting a complete understanding of ESG effectiveness. Leveraging a robust dataset of US firms from 2017 to 2023, this research employs advanced econometric analysis of the Generalised Method of Moments (GMM) Panel Data Regression for addressing endogeneity issues to ensure unbiased and consistent estimates. Furthermore, this study examines the potential influence of the COVID-19 pandemic by conducting a comparative analysis that includes and excludes the pandemic period, allowing for an assessment of whether ESG’s financial impact is consistent or influenced by macroeconomic shocks. The study develops three hypotheses to comprehensively test the significance and variability of ESG’s impact across different financial performance indicators. The first hypothesis posits that ESG significantly influences firms’ financial performance irrespective of their sectoral affiliation. The second hypothesis suggests that the impact of ESG on financial performance differs across various industry sectors. The third hypothesis asserts that the influence of ESG on financial performance varies depending on a firm's ESG rank, categorised as high-ESG, medium-ESG, or low-ESG. To ensure a comprehensive assessment, the study evaluates market-based metrics (excess returns), accounting-based indicators (ROA, ROE), and financial stability measures (Altman Z-score and KZ Index). The findings reveal that ESG scores significantly influence financial performance but with substantial variation across sectors and ESG rankings. ESG positively impacts financial flexibility (KZ Index) across most sectors. It indicates that firms with strong ESG profiles experience easier access to capital and reduced financial constraints, reinforcing their longterm stability. However, short-term profitability indicators such as ROA and ROE exhibit no consistent pattern, suggesting that ESG’s financial benefits may be more structural and longterm than immediate. The sectoral analysis indicates that industries like Energy, Utilities, and Consumer Staples benefit from adopting ESG practices. In contrast, others, such as Healthcare and Communication Services, face financial trade-offs due to ESG-related costs. Additionally, the study finds that medium-ESG firms often exhibit neutral results, indicating that firms with moderate ESG efforts may not experience the financial benefits seen in high-ESG firms nor the financial constraints observed in low ESG firms. This research significantly contributes by demonstrating the critical influence of sector-specific ESG and firm-level ESG scores on financial performance, offering actionable insights for corporate governance, investment strategies, and policymaking. By identifying that the impact of ESG varies considerably across sectors, the study provides a clear rationale for developing sector-tailored ESG policies and practices. This emphasis on sector-specificity in ESG implementation will ensure that the best practices are followed, leading to more effective ESG outcomes. For instance, industries with high environmental exposure may benefit more from robust environmental initiatives, while governance improvements might yield more significant benefits in sectors prone to regulatory scrutiny. The differentiation of excess return based on ESG scores (high, medium, low) equips investors with a more nuanced understanding of riskadjusted returns, enabling them to allocate resources effectively toward firms. For policymakers, the findings advocate for frameworks encouraging industry-specific ESG adoption while addressing challenges such as data standardisation and inter-sectoral comparability. By analysing periods with and without the COVID-19 pandemic, the study underscores that ESG practices enhance resilience during economic disruptions, particularly in capital-intensive industries like Energy, Utilities, and Materials.

Impact of ESG (Environmental, Social, Governance) on the Financial Performance of US Firms: A Sector Based Approach

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