The effectiveness of any sanction depends on the costs of avoiding its restrictions. We examine whether bearish option strategies were substitutes for short sales during the September 2008 short-sale ban. We find a significant diminution in option volumes and a significant increase in option...

This paper analyzes how newly introduced transparency requirements for short positions affect investors' behavior and security prices. Employing a unique data set, which contains both public positions above and confidential positions below the regulatory disclosure threshold, we offer several...

We examine if differences in short selling volumes and the information impounded by short sells can contribute to explaining pricing differences which exist between the A- and H-share markets in China. In particular, we argue and also find that informed short selling around earnings...