Contrary to existing event studies around option listing introductions, we show short selling and options trading are complements, rather than substitutes. Further, while a plethora of literature demonstrates both short sellers and option traders are informed traders, relatively little is known...

This study re-examines the return-volatility relationship and dynamics under a new VAR framework. By analyzing two model-free implied volatility indices - VIX (the U.S.) and VKOSPI (Korea) - and their corresponding stock market indices, we found an asymmetric volatility phenomenon in both...

The authors re-examine the return-volatility relationship and its dynamics under a new vector autoregression (VAR) identification framework. By analyzing two model-free impliedvolatility indices - the well-established VIX (in the United States) and the recently published VKOSPI (in Korea) - and...

This paper proposes a new measure of firm information asymmetry. The information asymmetry measure is based on causality tests relating repurchase information to firm returns. Our results indicate that firms with greater information asymmetry show larger abnormal returns surrounding the...

Contrary to existing event studies around option listing introductions, we show short selling and options trading are complements, rather than substitutes. Further, while a plethora of literature demonstrates both short sellers and option traders are informed traders, relatively little is known...

This paper proposes a new measure of firm information asymmetry. The information asymmetry measure is based on causality tests relating repurchase information to firm returns. Our results indicate that firms with greater information asymmetry show larger abnormal returns surrounding the...

We investigate whether senior officers use accrual-based earnings management to meet voluntary earnings disclosure (i.e., management earnings forecasts) before selling or buying their own shares when they have private information. This study is the first to use the differences in timing of...

In this study, we examine the patterns and determinants of share repurchases using firm-level data from seven major countries—Australia, Canada, France, Germany, Japan, the U.K., and the U.S.—over the period 1998–2006. We find that while non-U.S. firms do not repurchase shares as much as...

The authors re-examine the return-volatility relationship and its dynamics under a new vector autoregression (VAR) identification framework. By analyzing two model-free impliedvolatility indices - the well-established VIX (in the United States) and the recently published VKOSPI (in Korea) - and...

This study re-examines the return-volatility relationship and dynamics under a new VAR framework. By analyzing two model-free implied volatility indices - VIX (the U.S.) and VKOSPI (Korea) - and their corresponding stock market indices, we found an asymmetric volatility phenomenon in both...