The Relevance of Market Correlation for the Portfolio Selection - An Individual Investor Long Term Perspective
This paper applies BEKK-type model to explain the interdependence between markets that might be relevant to a Polish individual saving for retirement. The investor is assumed to look for cross-country and cross-asset diversification of the long-term investment yielding the optimal portfolio, with performance assessed using local currency returns. Monte Carlo simulation methodology was used to better capture the market dynamics, especially with respect to market interdependence assumptions.
The high level findings of the optimal portfolio composition reconfirm that even a local currency investor, looking at local currency returns, can benefit from broadening of the investment spectrum, at the same time however providing supportive arguments for a strong bias towards local currency government bonds. The results question relatively high proportion of equity component offered as default by majority savings providers or mutual funds. This encourages reflection on the society-wide consequences of following predefined structures, frequently supported by policy reforms, which may lead to excessive shift of business risks onto the households. These results prove robust when using various measures of market interdependence as well as when capturing the recent COVID related market turmoil.
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