The requirement of positive marginal utility only makes it possible to derive a restricted twofundseparation theorem for portfolio selection problems replacing the original separation theorem ofCass and Stiglitz (1970). We use our findings for a re-examination of the bias-in-beta problem in...

We consider investors with mean-variance-skewness preferences who aim at selecting oneout of F different funds and combining it optimally with the riskless asset and direct stock holdings.Direct stock holdings are either exogenously or endogenously determined. In our theoretical section,we...

The most relevant practical impediment to an application of the Markowitz portfolio selectionapproach is the problem of estimating return moments, in particular return expectations. We analyzethe consequences of using return estimates implied by analysts’ dividend forecasts under the...

In the literature, implied rates of return are suggested as estimators for future expected oneperiodreturns because of their property not being prone to the discount rate effect. The discount rateeffect describes the problem that changes in expected future one-period returns lead to...

Investors need performance measures particularly as a means for funds selection inthe process of ex-ante portfolio optimization. Unfortunately, there are various performancemeasures recommended for different decision situations. Since an investor may be uncertainwhich kind of decision problem is...

Die Schätzung unbekannter Momente von Wertpapierrenditen ist unabdingbarfür praktische Anwendungen der Markowitz-Portfoliotheorie. Es wird gezeigt, wie dieses Datenbe-schaffungsproblem sowohl mittels mathematisch-statistischer Verfahren als auch durch die Nutzbar-machung des Expertenwissens...

The requirement of existing utility with positive first derivative only makes it pos-sible to derive a restricted two-fund separation theorem for portfolio selection problems withHARA utility replacing the original separation theorem of Cass and Stiglitz (1970). We useour findings for a brief...

We consider investors with mean-variance-skewness preferences who aim at select-ing one out of F different funds and combining it optimally with the riskless asset and directstock holdings. Direct stock holdings are either exogenously or endogenously determined. Inour theoretical section, we...

Our main goal is the generalization of the approach of Jobson and Korkie(1984) forfunds performance evaluation. Therefore, we consider the portfolio selection problem of aninvestor who faces short sales restrictions when choosing among F different investment fundsand assume the investor's...

Paradoxerweise kann sich die über das Jensen-Maß quantifizierte Performanceeines Investmentfonds verschlechtern, wenn der jeweilige Fondsmanager zusätzliche In-formationen erhält, auch wenn er diese im Interesse der Investoren zu nutzen gedenkt.Rechnerisch ist für dieses Phänomen eine...