L’effet momentum et les marchés boursiers

L’effet momentum et les marchés boursiers

Ahsan Zubair

60,52 €
IVA incluido
Disponible
Editorial:
KS OmniScriptum Publishing
Año de edición:
2025
Materia
Banca
ISBN:
9786209076527
60,52 €
IVA incluido
Disponible

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La théorie financière traditionnelle affirme qu’il est impossible de prédire les cours boursiers futurs et de réaliser des profits anormaux sur la base des stratégies de trading. Cependant, plusieurs chercheurs ont démontré dans les années 1980 que les cours boursiers sont prévisibles sur la base de leurs rendements passés. En 1993, Jegadeesh et Titman ont découvert un effet momentum à moyen terme dans les cours boursiers, les gagnants passés continuant à surperformer les perdants passés d’environ 1 % par mois sur une période de 3 à 12 mois. Par la suite, de nombreuses études ont démontré que l’effet momentum est un phénomène mondial. Parmi les différentes explications possibles de l’effet momentum, il semble que ni l’explication liée au risque, ni la recherche de données et la méthodologie imparfaite ne soient en mesure de fournir une explication largement acceptée du phénomène. La théorie de la finance comportementale, à l’aide de certains modèles, semble toutefois fournir les meilleures explications de l’effet momentum. Ces modèles comportementaux sont trop nombreux et aucun d’entre eux n’est supérieur aux autres, car chaque modèle contribue individuellement à expliquer l’effet momentum sur différents marchés ou différents types d’actions.

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