How many stocks are enough for diversifying Canadian institutional portfolios?

Vitali Alexeev and Francis Tapon

No 2014-08, Working Papers from University of Tasmania, Tasmanian School of Business and Economics

Abstract: Portfolio risk is a function of the number of stocks held in portfolios. We simulate portfolios using daily observations for all traded and delisted equities in Canada from 1975 to 2011 and we calculate several measures of risk, including heavy-tailed to account for black swan events. For each risk measure, we calculate the average number of portfolio holdings and the upper limits of these holdings to assure investors of a specific reduction in diversifiable risk. In contrast to previous literature that suggests 10-15 stocks are enough to provide adequate diversification for an average investor, we find that in fact more than 50 stocks are needed to achieve the same level of diversification most of the time instead of on average.

Keywords: Portfolio diversification; heavy tailed risk; expected shortfall; time series standard deviation; terminal wealth standard deviation; Canadian equities; institutional investors. (search for similar items in EconPapers)
Pages: 12 pages
Date: 2014, Revised 2014
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

Published by the University of Tasmania, Discussion paper 2014-8

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