This paper proposes a novel approach to the combination of conditional covariancematrix forecasts based on the use of the Generalized Method of Moments (GMM). Itis shown how the procedure can be generalized to deal with large dimensional systemsby means of a two-step strategy. The finite sample...

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 shows that in financial markets with endogenous asset supply and demand, both rational and noise traders do coexist in the long run. The finding implies that financial markets are neither informationally nor allocationally efficient. While rational traders have a consistently higher...

Vorliegendes Arbeitspapier analysiert die Einflüsse intertemporaler Renditezusammenhänge und fester Startwerte in Vektorautoregressions-(VAR-) Modellen für stetige Renditen anhand des Vergleichs mit einem statischen Random-Walk-Modell.

We present evidence of the impact of buy-side analysts on the behavior and performanceof fund managers. Using data provided by a large global asset manager,we relate buy-side analysts’ recommendations to fund transactions on a daily basis.Our results show that buy-side analysts have a...

The co-movement of stocks and of fundamentals changes across the business cycle. Empiricalstudies have shown that the correlation of stock returns is stronger in crisis. Weshow that the correlation of fundamentals is the highest during crisis using a large sampleof quarterly firm revenues...

This paper considers a multivariate t version of the Gaussian dynamic conditional correlation(DCC) model proposed by Engle (2002), and suggests the use of devolatized returnscomputed as returns standardized by realized volatilities rather than by GARCH type volatilityestimates. The t-DCC...

Analysts providing more accurate earnings forecasts also issue moreprofitable recommendations. We demonstrate how investors can profit fromthis contemporaneous link by differentiating between “able” and “lucky”analysts. In line with previous studies, we find that past track records...

This paper investigates the extent to which voluntary disclosure quality (VDQ) of firms isreflected in equity prices. In environments where we expect informational efficiency to behigh, VDQ is not associated with returns beyond those available through passively investingin popular styles, and a...

Die private Finanzplanung hat sich im deutschen Markt für Finanzdienstleistungenin den letzten Jahren zu einem Wachstumssegment entwickelt. Mittlerweile bieten fast alle Finanzdienstleisterauf verschiedene Kundengruppen zugeschnittene Finanzplanungsberatungen an. EinenSchritt weiter geht die...