Using intradaily high-frequency data on KOSDAQ composite index and venture index over January 1997 to May 2000, we study the properties of intradaily realized volatility. We show that the unconditional realized variances for the both indices have fat-...
Using intradaily high-frequency data on KOSDAQ composite index and venture index over January 1997 to May 2000, we study the properties of intradaily realized volatility. We show that the unconditional realized variances for the both indices have fat-tailed distribution and are skewed to the right. These properties are especially much stronger for the venture index. We also research the empirical characteristics for the conditional volatility distribution of both indices. Using fractional integrated model, we show that the conditional volatilities of both variables are very persistent. Furthermore, realized volatilities accounts for the leverage effect for the rate of returns for both indices.