ESG and stock performance

Table of Contents

1. Introduction

2. Concept of ESG and CSR

3. ESG rating agencies

3.1 Provider and measurement

3.2 Divergence of ESG ratings

3.3 Reasons for divergence in ESG ratings

3.4 Implications of ESG rating divergence

4. Literature overview: The effect of positive ESG rating on stock performance

4.1 Theoretical background: Hypotheses in the literature about the effect of positive ESG rating on stock performance

4.2 Stock performance of positively rated ESG portfolios in empirical studies

4.3 Limitations of discussed empirical studies

5. Empirical study: Performance of a positively rated ESG portfolio

5.1 Data

5.2 Analysis of historical returns and the Sharpe ratio

5.3 Results and limitations

6. Conclusion

Objective and Research Focus

This thesis investigates the impact of positive Environmental, Social, and Governance (ESG) ratings on stock market performance. It aims to bridge the gap between academic debate on ESG effectiveness and practical market outcomes by providing both a literature review and an original empirical analysis of portfolio performance.

• Analysis of the divergence in ESG ratings among major agencies.
• Evaluation of theoretical hypotheses regarding ESG and corporate financial performance.
• Construction and backtesting of a positively rated ESG portfolio (PESG).
• Comparative performance study against a negatively rated portfolio (NESG) and the MSCI ACWI Index.
• Examination of risk-adjusted returns using the Sharpe ratio.

Excerpt from the Book

Summary of Chapters

1. Introduction: Outlines the rise of socially responsible investing and states the research goal to analyze the effect of positive ESG ratings on stock performance.

2. Concept of ESG and CSR: Defines the pillars of ESG and the broad, heterogeneous landscape of Corporate Social Responsibility (CSR) definitions.

3. ESG rating agencies: Critically examines the providers of ESG data and identifies significant rating divergence as a major issue for empirical validity.

4. Literature overview: The effect of positive ESG rating on stock performance: Summarizes common hypotheses and empirical findings, noting mixed results ranging from neutral to positive effects.

5. Empirical study: Performance of a positively rated ESG portfolio: Details the methodology for constructing PESG and NESG portfolios and presents the comparative results of their historical returns and Sharpe ratios.

6. Conclusion: Synthesizes findings, emphasizing that while ESG portfolios performed well, the best historical performance was observed in the negatively rated portfolio, highlighting the complexity of ESG-based investment strategies.

Keywords

ESG, CSR, Stock Performance, Rating Divergence, SRI, Sharpe Ratio, Portfolio Management, Sustainability, Empirical Study, MSCI ACWI, Financial Performance, Investment Strategy, Corporate Governance, Market Returns, Asset Pricing.

Frequently Asked Questions

What is the primary focus of this research?

The thesis focuses on determining whether companies with high ESG ratings achieve superior stock market returns compared to conventional firms or negatively rated ones.

What are the core thematic areas?

The study covers ESG rating methodologies, the phenomenon of rating divergence, theoretical hypotheses connecting social responsibility to financial gains, and empirical performance testing of ESG portfolios.

What is the main research objective?

The goal is to provide a comprehensive overview of existing literature on ESG performance and to contribute a novel empirical analysis based on a consensus-driven portfolio selection method.

Which methodology is employed in the empirical study?

The author constructs portfolios (PESG and NESG) based on consistent ratings from five major agencies and compares their historical monthly returns and Sharpe ratios against the MSCI ACWI benchmark.

What does the main body of the work cover?

It covers the definition of ESG, a critical review of rating agencies, an analysis of literature hypotheses (such as "doing good while doing well"), and a detailed empirical assessment of portfolios from 2005 to 2019.

Which keywords best characterize this work?

Key terms include ESG, rating divergence, stock performance, Sharpe ratio, and sustainable investment.

Why is ESG rating divergence considered a significant problem?

Rating divergence means that different agencies assess the same firm differently, which can lead to biased results in empirical studies and poses a risk for investors relying on a single rating source.

How does the performance of the positively rated portfolio compare to the market?

The study finds that while the positively rated ESG portfolio (PESG) outperformed the broad market index (ACWI), the negatively rated portfolio (NESG) surprisingly yielded the highest returns in the analyzed period.