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The main purpose of our study is to determine the optimal portfolio choice of investors in the Nigerian Financial Market, in an attempt to see what proportion of their wealth they dedicate to stocks and Fixed Income Securities (FIS) under the financial market context in which they face, in order to see how their decision impact the development of Nigeria financially speaking. To achieve this purpose, Monthly data of an index (S&P BMI) and some Fixed Income Securities (FIS) like the 10 years FGB, T-Bills of 91 days, 12 Months DR, 6 Month DR, 3 Month DR and 1 Month DR have been collected over 7 years (2010-2016) were collected from the Central Bank of Nigeria website and online through the Data Stream Thomas Reuters. The Mean-Variance Approach was therefore used with the aim of determining the optimal portfolio composition of investors in six scenarios, where the S&P BMI was confronted respectively to each of the FIS. Nonetheless, in 70% of the scenarios viewed above the utility function was constant meaning that it was almost not affected by the investors´ level of risk tolerance and the optimal portfolio was mainly formed by nearly a 100% of Fixed Income Securities.

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NKOUEBO NGONGI LEANDRE CAMILLE is born on 20/09/1984 in Rome (Italy). In 2013/2014 he obtained his Bachelor Degree in ECONOMICS and TRADE at the School of Management and Economics of Turin, then in 2016/2017 a Master´s Degree in QUANTITATIVE FINANCE AND INSURANCE at the same school. From 09/01/2018 he works at the MITIGO SERVIZI SRL in Turin.

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