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Portfolio Optimization Efficiency Test Considering Data Snooping Bias

Author

Listed:
  • Kresta Aleš

    (VSB – Technical University of Ostrava, Faculty of Economics, Czech Republic)

  • Wang Anlan

    (VSB – Technical University of Ostrava, Faculty of Economics, Czech Republic)

Abstract

Background: In the portfolio optimization area, most of the research is focused on insample portfolio optimization. One may ask a rational question of what the efficiency of the portfolio optimization strategy is and how to measure it.Objectives: The objective of the paper is to propose the approach to measuring the efficiency of the portfolio strategy based on the hypothesis inference methodology and considering a possible data snooping bias. The proposed approach is demonstrated on the Markowitz minimum variance model and the fuzzy probabilities minimum variance model.Methods/Approach: The proposed approach is based on a statistical test. The null hypothesis is that the analysed portfolio optimization strategy creates a portfolio randomly, while the alternative hypothesis is that an optimized portfolio is created in such a way that the risk of the portfolio is lowered.Results: It is found out that the analysed strategies indeed lower the risk of the portfolio during the market’s decline in the global financial crisis and in 94% of the time in the 2009-2019 period.Conclusions: The analysed strategies lower the risk of the portfolio in the out-of-sample period.

Suggested Citation

  • Kresta Aleš & Wang Anlan, 2020. "Portfolio Optimization Efficiency Test Considering Data Snooping Bias," Business Systems Research, Sciendo, vol. 11(2), pages 73-85, October.
    • Handle: RePEc:bit:bsrysr:v:11:y:2020:i:2:p:73-85:n:6
    DOI: 10.2478/bsrj-2020-0016
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    References listed on IDEAS

    as
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    More about this item

    Keywords

    data snooping bias; financial crisis; hypothesis test; minimum-risk portfolio; portfolio optimization;
    All these keywords.

    JEL classification:

    • G11 - Financial Economics - - General Financial Markets - - - Portfolio Choice; Investment Decisions
    • G17 - Financial Economics - - General Financial Markets - - - Financial Forecasting and Simulation

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