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Uppsala University

1. Barkino, Iliam. Enough is Enough : Sufficient number of securities in an optimal portfolio.

Degree: Business Studies, 2016, Uppsala University

This empirical study has shown that optimal portfolios need approximately 10 securities to diversify away the unsystematic risk. This challenges previous studies of randomly chosen portfolios which states that at least 30 securities are needed. The result of this study sheds light upon the difference in risk diversification between random portfolios and optimal portfolios and is a valuable contribution for investors. The study suggests that a major part of the unsystematic risk in a portfolio can be diversified away with fewer securities by using portfolio optimization. Individual investors especially, who usually have portfolios consisting of few securities, benefit from these results. There are today multiple user-friendly software applications that can perform the computations of portfolio optimization without the user having to know the mathematics behind the program. Microsoft Excel’s solver function is an example of a well-used software for portfolio optimization. In this study however, MATLAB was used to perform all the optimizations. The study was executed on data of 140 stocks on NASDAQ Stockholm during 2000-2014. Multiple optimizations were done with varying input in order to yield a result that only depended on the investigated variable, that is, how many different stocks that are needed in order to diversify away the unsystematic risk in a portfolio. 

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Subjects/Keywords: Optimal Portfolio; Random Portfolio; Optimization; Modern Portfolio Theory; Variance; Covariance; Diversification; Relative Standard Deviation

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Barkino, I. (2016). Enough is Enough : Sufficient number of securities in an optimal portfolio. (Thesis). Uppsala University. Retrieved from http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-298462

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16th Edition):

Barkino, Iliam. “Enough is Enough : Sufficient number of securities in an optimal portfolio.” 2016. Thesis, Uppsala University. Accessed October 21, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-298462.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7th Edition):

Barkino, Iliam. “Enough is Enough : Sufficient number of securities in an optimal portfolio.” 2016. Web. 21 Oct 2019.

Vancouver:

Barkino I. Enough is Enough : Sufficient number of securities in an optimal portfolio. [Internet] [Thesis]. Uppsala University; 2016. [cited 2019 Oct 21]. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-298462.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Barkino I. Enough is Enough : Sufficient number of securities in an optimal portfolio. [Thesis]. Uppsala University; 2016. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-298462

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

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