This paper examines the dynamics of returns and order imbalances across the KOSPI 200 cash, futures and option markets. The information effect is more dominant than the liquidity effect in these markets. In addition, returns have more predictability power for the future movements of prices than...

We examine the effect of transaction costs on implied volatility structure, parameter estimation, and hedging. Using simulations, we document that: (1) Transaction costs can generate the volatility smile phenomena even in the Black-Scholes economy. Especially, volatility smile effect is very...

This study examines the impacts of net buying pressure on implied volatility, and documents the fact that Bollen and Whaley (2004)'s net buying pressure hypothesis does not hold in the daily data of the KOSPI200 options market. In addition, using intraday data, we show that the net buying...