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Relative portfolio optimization via a value at risk based constraint

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  • Nicole Bauerle
  • Tamara Goll

Abstract

In this paper, we consider $n$ agents who invest in a general financial market that is free of arbitrage and complete. The aim of each investor is to maximize her expected utility while ensuring, with a specified probability, that her terminal wealth exceeds a benchmark defined by her competitors' performance. This setup introduces an interdependence between agents, leading to a search for Nash equilibria. In the case of two agents and CRRA utility, we are able to derive all Nash equilibria in terms of terminal wealth. For $n>2$ agents and logarithmic utility we distinguish two cases. In the first case, the probabilities in the constraint are small and we can characterize all Nash equilibria. In the second case, the probabilities are larger and we look for Nash equilibria in a certain set. We also discuss the impact of the competition using some numerical examples. As a by-product, we solve some portfolio optimization problems with probability constraints.

Suggested Citation

  • Nicole Bauerle & Tamara Goll, 2025. "Relative portfolio optimization via a value at risk based constraint," Papers 2503.20340, arXiv.org.
    • Handle: RePEc:arx:papers:2503.20340
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    File URL: http://arxiv.org/pdf/2503.20340
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