This study aims to analyze the impact of macroeconomic variables, especially the prime rate of the economy, on the interest margin (spread) charged by Brazilian banks from 2000 to 2010. To achieve this goal, the study adopted the behavior model of the banking firm developed by Ho and Saunders...

This paper studies the relation between firm value and a firm's growth options. We find strong empirical evidence that (average) Tobin's Q increases with firm-level volatility. However, the significance mainly comes from R&D firms, which have more growth options than non-R&D firms. By...

We conduct an extensive empirical analysis of VIX derivative valuation models before, during and after the 2008-2009 financial crisis. Since the restrictive mean reversion and heteroskedasticity features of existing models yield large distortions during the crisis, we propose generalisations...