Cette thèse évalue la performance financière de l'investissement socialement responsable (ISR). Dans le but de surmonter le manque de consensus sur le thème de recherche, nous proposons d'aborder la question sous l'angle de la généralisation à travers une approche méta-analytique ayant pour objectif de démontrer un lien de cause à effet entre ISR et performance financière (ou boursière). A travers l'étude d'un corpus empirique d'observation incluant 75 études (161 expérimentations) sur la période 1972-2009 sélectionnées sur la base de notre propre typologie définitionnelle de l'ISR, nous articulons notre recherche autour de deux études : exploratoire et approche méta-analytique.L'étude exploratoire fournit ainsi, via l'utilisation de tests non paramétriques (Chi-deux) et de l'analyse de données (analyse factorielle des correspondances simple et multiple, classification ascendante hiérarchique), des typologies d'effet ISR sur la performance financière regroupant natures d'impact ISR sur la performance (positif, négatif ou neutre) et modalités de variables méthodologiques (marché ISR, méthode de comparaison de données, mesure de la performance financière…). L'approche méta-analytique (la première dans le champ de recherche) explore la relation entre ISR et performance financière sur un corpus réduit (61 études / 123 expérimentations). Les résultats observés tendent à prouver que l'éthique n'a pas de coût financier et génère des rentabilités similaires (voire légèrement supérieure) à celle de l'investissement conventionnel. Nous observons également que les choix empiriques effectués par les auteurs influencent considérablement la nature de la performance financière de l'ISR. / This thesis evaluates the financial performance of socially responsible investment (SRI). In the purpose of overcoming the lack of consensus on the research theme, we propose to approach the question under the angle of generalization across a meta-analytical approach, aiming to demonstrate a link between SRI and financial performances (or stock exchange performance) and identify the methodological determinants of this causal relationship. Across the study of an empirical corpus observation, including 75 studies (161 experimentations) across the 1972-2009 period, all selected on the basis of our own typological definition of SRI, we articulate our research around two studies : exploratory and meta-analytical approach.By the use of non-parametric tests (chi square), and of data analysis (simple and multiple correspondence analysis, ascending hierarchical clustering), the exploratory study provides typologies of SRI effects on the financial performance, gathering the nature of SRI impacts on performance (positive, negative or neutral) ant the terms of methodological variables (SRI market, data comparison method, financial performance measure...). The meta-analytical approach (first one in the field of research) explores the relation between SRI and financial performance on a reduced corpus (61 studies / 123 experimentations). The results we observed tend to prove that ethics has no financial cost and generates similar profitability (even slightly more) than a conventional investment. We also observe that the empirical choices made by the authors have a considerable influence on the nature of the ISR financial performance.

Socially responsible investing has presented itself as a growing, multifaceted, advanced and sophisticated investment philosophy. Socially responsible investment (SRI) involves incorporating social, ethical and responsible investment objectives with financial investment objectives during the investment decision-making process. Social, ethical and responsible investment objectives are set in line with environmental, social and corporate governance (ESG) criteria which are established within the SRI strategy followed. SRI strategies include screening (negative, positive and best-of-sector), shareholder activism and cause-based investing. Although international SRI markets such as that of the United States of America and the United Kingdom are sophisticated and established markets, the South African SRI market is still relatively new and is yet to reach its full potential. Thus, as a growing market, little research regarding the long term risk-adjusted performance of SRI funds in South Africa has been conducted. The long term risk-adjusted performance of the sample of SRI funds was measured through the use of five risk-adjusted performance measures, namely the Treynor ratio, Sharpe ratio, Jensen’s alpha, Sortino ratio and Omega ratio, and through the use of three performance measurement models which included the capital asset pricing model (CAPM), Fama-French three-factor model and Carhart four-factor model. The risk-adjusted performance of the sample of SRI funds was measured with the intent to establish if these funds out- or underperformed against three benchmark categories, namely the Financial Times Stock Exchange/Johannesburg Stock Exchange (FTSE/JSE) SRI Index, a matched sample of conventional investment (non-SRI) funds and the FTSE/JSE All Share Index. The probable effect of the 2007/08 global financial crisis was also measured to analyse whether such a hazardous market event affected the performance of the SRI funds. According to the results and findings, the risk-adjusted performance of the SRI funds has improved over the research period. However, the SRI funds neither outperformed nor underperformed against the three benchmark categories over the research period. The performance measurement models’ analysis indicated that the SRI funds were less sensitive to market fluctuations, more exposed to small capitalisation portfolios, more growth-oriented, and exhibited significant momentum after the period of the 2007/08 global financial crisis. Furthermore, the analysis indicated that the SRI funds significantly underperformed against the non-SRI funds during the Performance of socially responsible investment funds in South Africa research period. Mixed results were obtained with regards to the probable effect of the 2007/08 global financial crisis on the performance of the SRI funds.

Socially responsible investing has presented itself as a growing, multifaceted, advanced and sophisticated investment philosophy. Socially responsible investment (SRI) involves incorporating social, ethical and responsible investment objectives with financial investment objectives during the investment decision-making process. Social, ethical and responsible investment objectives are set in line with environmental, social and corporate governance (ESG) criteria which are established within the SRI strategy followed. SRI strategies include screening (negative, positive and best-of-sector), shareholder activism and cause-based investing. Although international SRI markets such as that of the United States of America and the United Kingdom are sophisticated and established markets, the South African SRI market is still relatively new and is yet to reach its full potential. Thus, as a growing market, little research regarding the long term risk-adjusted performance of SRI funds in South Africa has been conducted. The long term risk-adjusted performance of the sample of SRI funds was measured through the use of five risk-adjusted performance measures, namely the Treynor ratio, Sharpe ratio, Jensen’s alpha, Sortino ratio and Omega ratio, and through the use of three performance measurement models which included the capital asset pricing model (CAPM), Fama-French three-factor model and Carhart four-factor model. The risk-adjusted performance of the sample of SRI funds was measured with the intent to establish if these funds out- or underperformed against three benchmark categories, namely the Financial Times Stock Exchange/Johannesburg Stock Exchange (FTSE/JSE) SRI Index, a matched sample of conventional investment (non-SRI) funds and the FTSE/JSE All Share Index. The probable effect of the 2007/08 global financial crisis was also measured to analyse whether such a hazardous market event affected the performance of the SRI funds. According to the results and findings, the risk-adjusted performance of the SRI funds has improved over the research period. However, the SRI funds neither outperformed nor underperformed against the three benchmark categories over the research period. The performance measurement models’ analysis indicated that the SRI funds were less sensitive to market fluctuations, more exposed to small capitalisation portfolios, more growth-oriented, and exhibited significant momentum after the period of the 2007/08 global financial crisis. Furthermore, the analysis indicated that the SRI funds significantly underperformed against the non-SRI funds during the Performance of socially responsible investment funds in South Africa research period. Mixed results were obtained with regards to the probable effect of the 2007/08 global financial crisis on the performance of the SRI funds.

L’investissement éthique est un investissement fondé sur des critères extra-financiers : l’investisseur cherche un enrichissement tout en poursuivant une fin non matérielle tirée du respect de certaines valeurs La coloration éthique a vocation à rejaillir sur le régime de cet investissement. Elle dicte le contenu de la politique d’investissement, oblige les intermédiaires financiers à informer les investisseurs de manière adéquate, et les contraint à veiller à la conformité éthique de l’investissement jusqu’à son dénouement.L’investissement éthique ne saurait toutefois se limiter à cela. Adoptant une démarche conséquentialiste, les investisseurs peuvent s’engager auprès des émetteurs pour y défendre leurs valeurs. D’un point de vue théorique, cet activisme actionnarial met en lumière l’échec des thèses traditionnelles à définir la finalité des sociétés. Plutôt que de raisonner en termes d’intérêt social, il conviendrait à présent de recourir à la Stakeholder Theory. / Ethical investment is based on non-financial criteria: the investor expects a return on the investment while pursuing a non-material objective, based on the respect of certain values. Ethics bring a nuance, which impacts the set of rules for this type of investment. It establishes the content of the investment policy and requires financial intermediaries to inform investors adequately. It also forces them to ensure ethical compliance of the investment to its ending. Ethical investment, however, is not limited to this. By adopting a consequentialist approach, investors can engage with issuers to defend their values. From a theoretical point of view, this shareholder activism highlights the failure of traditional theories to define the purpose of companies. Because the concept of “intérêt social”, which the French doctrine struggles to define, leads to a deadlock, a cross-disciplinary approach, the Stakeholder Theory, should be preferred.