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Applied researchers often test for the difference of the variance of two investment strategies;in particular, when the investment strategies under consideration aim to implementthe global minimum variance portfolio. A popular tool to this end is the F-test for theequality of variances....
In this paper we determine optimal trading strategies associated withthe financial variance and standard deviation principles of Schweizer (1997). These principles take into consideration the possibilities of hedging on the financial market and are derived by an indifference argument, which...
In the 40’s and early 50’ two decision theories were proposed and have since dominated the sceneof the fascinating field of decision-making. In 1944 – when von Neumann and Morgenstern showedthat if preferences are consistent with a set of axioms then it is possible to represent these...
Variance contracts permit the trading of ’variance risk’, i.e. the risk that the realizedvariance of stock returns changes randomly over time. We discuss why investorsmight want to trade this type of risk, and why they might prefer a variance contractto standard calls and puts for this...
Die klassische, von Markowitz entwickelte, Portfoliotheorie basiert auf spezifischen Risikomaßen, der Renditevarianz bzw. der Renditestandardabweichung. Diese Risikomaße messen primär die Volatilität der Renditeentwicklung...
A random variable dominates another random variable with respectto the covariance order if the covariance of any two monotone increasingfunctions of this variable is smaller. We characterize completely thecovariance order, give strong sufficient conditions for it, present a numberof examples in...
We consider a simple random walk process, a special case ofthe Martingale model, which exhibits a deterministic break in its drift term,for instance, from positive to negative. This particular example can be aplausible model for a time series on exchange rates which displays a persistentcurrency...
We derive an explicit formula of the Watts’ poverty index, in terms of parametersof bivariate lognormal distributions of price indices and nominal livingstandards. This result enables us to: analyse the contributions of the distributionsof prices and nominal living standards in poverty;...
Lange Zeit stand man in der Marketing- und Sozialforschung vor dem Problem die kausalenZusammenhänge nicht beobachtbarer Variablen – so genannte Konstrukte – modellierenund vor allem erforschen zu können.Zwar gab es die Regressionsanalyse, mit deren Hilfe man den Einfluss mehrerer...
This study explores the information content of HML and SMB by linking the Fama-French factors toshocks in the state variables which predict future investment opportunities. It shows that the HMLfactor contains information about shocks to default spread. Moreover, the Fama-French modelexplains...