This study focus on applying the Heston's stochastic volatility model, to the Greek stock market, by estimating the … futures values of volatility …

idiosyncratic volatility. We contend that at the firm level, the sample correlation between unexpected returns and expected … idiosyncratic volatility can cloud the true relation between the expected return and expected idiosyncratic volatility. We show … strong evidence that unexpected idiosyncratic volatility is positively related to unexpected returns. Using unexpected …

between stock returns and idiosyncratic return volatility at the firm level. By allowing for the volatility of the underlying … idiosyncratic choice variables to exhibit independent switches between a high and low volatility regime, we show that the options …' constant expected returns are composed of (i) a state dependent drift term that relates positively with the volatility regime …

This paper examines continuous-time models for the price and volatility processes of individual stocks and the S … diffusive volatility innovations we find that the first principal component is highly correlated with index variance innovations …

options under low-dimensional stochastic volatility models. We derive multidimensional transforms which allow us to construct … efficient path-independent lattices for virtually all low-dimensional stochastic volatility models given in the literature … including one volatility factor-based stochastic volatility (SV) models, two volatility factors-based SV models, stochastic …

the derivation of a unique variance risk premium and price of volatility risk based only on the underlying return and … volatility dynamics for a wide class of stochastic volatility (SV) models. The SD approach also derives under similar conditions … volatility risk prices yield in option values in comparison to prices extracted from observed option market data. We also present …