Expected returns can hardly be estimated from time series data. Therefore, many recent papers suggest investing in the global minimum variance portfolio. The weights of this portfolio are usually estimated by replacing the true return covariance matrix by its time series estimator. However,...

It seems to be widely accepted that Jensen alpha fails to detect successful market timing funds spuriously indicating poor fund performance. Jensen (1972), Admati and Ross (1985), Dybvig and Ross (1985), and Grinblatt and Titman (1989), (1995) attribute that to an upwards biased estimate of the...

Nach §44 Investmentgesetz (InvG) sind Investmentfonds verpflichtet, im Rahmen ihres regelmäßigen Berichtswesens den Anlegern zumindest halbjährlich ihre Portfoliozusammensetzung bekannt zu geben. Häufigere oder auch detailliertere Portfolioveröffentlichung erhöht die Trans parenz des...

In this paper we develop the rst estimator of the covariance matrix that relies solely onforward-looking information. This estimator only uses price information from a cross-sectionof plain-vanilla options. In an out-of-sample study for US blue-chip stocks we show that aminimum-variance strategy...

This paper investigates the dynamics of the term structure of bond market illiquidity premia. We analyze the comovement of short-, medium-, and long-termilliquidity premia and identify economic factors determining them. Our resultsshow that the term structure of illiquidity premia is U-shaped on...

This paper serves two purposes. First, we introduce a new data set on the German stock marketwhich is publicly available to all researchers. It comprises factor returns (a market factor, asize factor, a book-to-market factor, and a momentum factor) as well as returns of portfolioswhich are...

This paper conducts a comprehensive asset pricing study based on a unique dataset for theGerman stock market. For the period 1963 to 2006 we show that value characteristics andmomentum explain the cross-section of stock returns. Corresponding factor portfolios havesignificant premiums across...