This paper uses the cross-sectional variance of the betas from the CAPM model to study herd behavior towards market index in Romania. For time-varying beta determination, three different modeling techniques are employed: two bivariate GARCH models (DCC and FIDCC GARCH), two Kalman filter based...

We use pre-World War I Brussels Stock Exchange (BSE) data to investigate the relation between average stock returns and market beta, size, momentum, dividend yield and total risk on the cross-section of stock returns. Based on portfolio sorts and Fama–MacBeth regressions, we find no...

This paper provides a theoretical explanation for the heteroscedasticity of asset returns. In line with existing empirical results, our model yields an asymmetric relationship between stock return and volatility. Based on the simple assumptions that investors behave according to Prospect Theory...

The general conclusion of a very large literature on the equity premium puzzle is that the simplest version of the consumption-based asset pricing model (C-CAPM) with time-additive, power utility is inconsistent with the data. I show that this conclusion is premature and the simplest version can...

In this paper we consider the question of how to improve the efficacy of strategies designed to capture factor premiums in equity markets and, in particular, from the value, quality, low risk and momentum factors. We consider a number of portfolio construction approaches designed to capture...

Decision-makers typically rely on informative starting points that are somewhat incorrect and then attempt to make appropriate adjustments. Such reliance on informative starting points may be an optimal response of a Bayesian decision-maker who faces finite computational resources (Lieder et al...

Modern Portfolio Theory, the Capital Asset Pricing Model, and the Efficient Market Hypothesis are the cornerstone concepts in both academic and professional curricula. In spite of their long history and reputation, the CAPM and its extensions are not able to yield satisfactory empirical results....

Modern Portfolio Theory, the Capital Asset Pricing Model, and the Efficient Market Hypothesis are cornerstone concepts in both academic and professional curricula. In spite of their long history and reputation, the CAPM and its extensions do not yield satisfactory empirical results. We argue...

We study a continuous-time pure exchange economy where idiosyncratic cash flow risks are priced via investors' heterogeneous beliefs. Investors perceive idiosyncratic cash flow risks differently through heterogeneous subjective mean growth rates on a firm's cash flow. This impacts equilibrium...

We analyse the relationship between large cap returns and sentiment indexes, using a Capital Asset Pricing Model (CAPM) framework. We try to provide a better explanation of asset prices and their deviations from standard theories by means of sentiment indicators, assuming the latter being...