We analyse the relationships between return calculation methods, risk and observation periods. We show that the mean of a return set calculated using logarithmic returns is less than the mean calculated using simple returns by an amount related to the variance of the set. This implies that there...

We evaluate whether machine learning methods can better model excess portfolio returns compared to the standard regression-based strategies generally used in the finance and econometric literature. We examine 17 benchmark factor model specifications based on Expected Utility Theory and theory...

This paper investigates the impact of Brexit events on the behaviour of 34 financial indices from 1st January 2012 to 26th April 2017. Our focus is to evaluate whether the impact of Brexit on financial markets is consistent with rational asset pricing models. The empirical research uses a...