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This paper focuses on Mean-Gini (MG) method for optimum portfolio selection. The MG framework, introduced by Shalit and Yitzhaki, is an attractive alternative as it is consistent with stochastic dominance rules regardless of the probability distributions of asset returns. Therefore, a MG framework is similar to a corresponding Mean-Variance (MV) framework in that it also uses two summary statisticsthe mean and a measure of dispersion to characterize the distribution of a risky prospect. The goal of this paper is to test MG strategy, based on Moroccan financial market data from turbulent market period of the years 2011, 2012, 2013 and 2014. In addition, those outcomes are explicitly tested in terms of Value-at-risque (VaR). The results show that MG strategy is profitable for investors. Moreover, we consider MG strategy to be safer in turbulent times.

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This article aims to understand the general context of research on the impact of ownership structure and performance of firms through a systematic review of references that include the keywords "ownership structure" and "performance" in their titles and that are published in English between 1990 and June 2020. For this purpose, we used articles published in journals indexed in the Scopus database. The uploaded articles are organized by the Mendeley Desktop tool and then transferred to the NVivo10 tool, in order to make a textual analysis of the elements contained in the articles. Data concerning the article, the characteristics of the study population, were collected. Our initial bibliographic search covered 229 articles published in 141 journals registered in more than 30 databases. It was found that the journals have published on this subject belongs to several disciplines related to governance, finance, and management and that they come from Anglo-Saxon countries. Our work can be considered as a support in the study of the scientific literature review related to ownership structure and performance.

The purpose of this study was to examine Mean-Gini strategy (MG) and Mean-Extended Gini strategy (MEG) for optimum portfolio selection, in terms of the monthly Rate of Return, Standard Deviation, Sharpe Ratio, Treynor Ratio and Jensen’s Alpha. This paper compared different optimum portfolio strategies, based on Moroccan financial market data taken from turbulent market periods between the years 2007 to 2015. Two distinct sub-periods were studied: (1) crisis period: 2007-2009; (2) post-crisis period: 2010-2015. The results show that both strategies were profitable for investors, but that the MEG strategy is the more appropriate and secure strategy for an individual investor.