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Cost Functions and Model Combination for VaR-based Asset Allocation using Neural Networks

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  • Yoshua Bengio
  • Nicolas Chapados

Abstract

We introduce an asset-allocation framework based on the active control of the value-at- risk of the portfolio. Within this framework, we compare two paradigms for making the allocation using neural networks. The first one uses the network to make a forecast of asset behavior, in conjunction with a traditional mean-variance allocator for constructing the portfolio. The second paradigm uses the network to directly make the portfolio allocation decisions. We consider a method for performing soft input variable selection, and show its considerable utility. We use model combination (committee) methods to systematize the choice of hyperparemeters during training. We show that committees using both paradigms are significantly outperforming the benchmark market performance. Nous introduisons un cadre d'allocation d'actifs basé sur le contrôle actif de la valeur à risque d'un portefeuille. À l'intérieur de ce cadre, nous comparons deux paradigmes pour faire cette allocation à l'aide de réseaux de neurones. Le premier paradigme utilise le réseau de neurones pour faire une prédiction sur le comportement de l'actif, en conjonction avec un allocateur traditionnel de moyenne-variance pour la construction du portefeuille. Le deuxième paradigme utilise le réseau pour faire directement les décisions d'allocation du portefeuille. Nous considérons une méthode qui accomplit une sélection de variable douce sur les entrées, et nous montrons sa très grande utilité. Nous utilisons également des méthodes de combinaison de modèles (comité) pour choisir systématiquement les hyper-paramètres pendant l'entraînement. Finalement, nous montrons que les comités utilisant les deux paradigmes surpassent de façon significative les performances d'un banc d'essai du marché.

Suggested Citation

  • Yoshua Bengio & Nicolas Chapados, 2002. "Cost Functions and Model Combination for VaR-based Asset Allocation using Neural Networks," CIRANO Working Papers 2002s-49, CIRANO.
  • Handle: RePEc:cir:cirwor:2002s-49
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    References listed on IDEAS

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