Artículo de revista ; The European Central Bank’s and the Federal Reserve’s announcements of unconventional monetary policies have contributed to significantly reducing market perceptions of the probability of extreme macro-financial events. This phenomenon has arisen in periods of intense...

The dissertation consists of three essays. Chapter II examines the asymmetriceffects of monetary policy on stock prices by using an unobserved components modelwith Markov-switching. My results show that monetary policy has negative effects onstock prices, which is consistent with the most recent...

This paper provides an empirical analysis of stock market reactions to monetary policy surprises. Its principal objective is to understand the heterogeneous nature of this type of response by examining a set of possible explanatory factors. I find that a hypothetical unanticipated increase of 25...

The first essay formulates a dynamic rational contagion model in order toanalyse the evolution of speculative bubbles. The model consists of two laws ofmotion: the speculative bubble and the probability of the bubble. The rst essayshows that the model has two stable equilibria and one unstable...

En este trabajo utilizamos un modelo VAR estructural con parámetros variables en el tiempo y volatilidad estocástica para investigar si la Reserva Federal ha respondido sistemáticamente a los precios de los activos y si esta respuesta ha cambiado con el tiempo. Para recuperar el componente...

En este artículo se evalúa el papel que desempeña el movimiento conjunto sectorial en la propagación de choques de política monetaria hacia el mercado de valores. En particular, se propone un modelo de vectores autorregresivos aumentado con factores, el cual permite cambios heterogéneos de...

Exchange traded funds have generated a great deal of interest in marketswhere they have been introduced including in the South African investmentmarket. In South Africa exchange traded funds are still relatively new and therange available is fairly narrow, however their popularity is growing at...

Gold stocks have historically traded, and continue to trade, at inflated multiplesrelative to the net asset value of the holding company and the rest of themarket. Therefore one of the most vexing questions for investors in metalequities seeking to make a ‘buy’ case on a gold stock is the...