, including market-based estimation of stochastic volatility models, the fine structure of equity-index option dynamics, leverage … and feedback effects in multifactor Wishart stochastic volatility for option pricing, option pricing with non …-Gaussian scaling and infinite-state switching volatility, stock return and cash flow predictability: the role of volatility risk, the …

) the statistical properties of the Korea's representative implied volatility index (VKOSPI) derived from the KOSPI 200 … options and (b) macroeconomic and financial variables that can predict the implied volatility process of the index, using … the VKOSPI. In addition, we find that the stock market return and implied volatility index of the US market (i.e., the S …

16:00) generally increases the variability of implied volatility spreads between puts and calls. In addition, it results … in considerable distortions at the outbreak of the COVID-19 pandemic and strongly affects aggregate implied volatility …

In a tractable stochastic volatility model, we identify the price of the smile as the price of the unspanned risks … traded in SPX option markets. The price of the smile reflects two persistent volatility and skewness risks, which imply a …-form and structural models of stochastic volatility …