We investigate optimal trading strategies under uncertainty in a nonparametric no-arbitrage framework that is consistent with an arbitrary number of assets. We show that extreme aversion to uncertainty precludes trading, and that preference for uncertainty induces market participation. In an...

In this paper, I study trading activities prior to M&A announcements pertaining to the rivals of the merging firms. I find that not only acquirers and targets experience increases in abnormal trading activities in stock and option markets, but also their rivals. The rise in option trading is...