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Der Wert von Renditeprognosen für Anlageentscheidungen

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Zusammenfassung

Für das Problem der Portfolioplanung wird unter der Voraussetzung konstanter absoluter Risikoaversion der erwartete Wert eines Informationssystems für den Fall bestimmt, daß die Renditen der riskanten Anlagemöglichkeiten sowohl a priori als auch a posteriori normalverteilt sind. Speziell wird die erwartungstreue, normalverteilte Schätzung von Einzel- und Indexrenditen und der Fall unvollständig bekannter a priori Daten behandelt. In allen betrachteten Fällen ist der erwartete Wert der Information proportional zum Informationsgehalt, wobei sich die absolute Risikoaversion als Proportionalitätsfaktor erweist.

Summary

For the problem of portfolio planning under the assumption of constant absolute risk aversion, the expected value of information is determined for the case that the prior as well as the posterior distributions of the rates of return of the risky assets are normal. In particular, the unbiased normally distributed estimation of the rates of return of the risky assets and of an index and the case of incomplete known prior data are treated. In all considered cases the expected value of information is proportional to the amount of information. Herein the absolute risk aversion is shown to be the factor of proportionality.

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Firchau, V. Der Wert von Renditeprognosen für Anlageentscheidungen. OR Spektrum 6, 167–176 (1984). https://doi.org/10.1007/BF01719615

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  • DOI: https://doi.org/10.1007/BF01719615

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