This paper provides an empirical study on the predictability of implied volatility using dataset collected from the … implied volatility characteristics across various maturities. We applied both in and out-of-sample tests that include the … provides evidence of non-random movement in the implied volatility series and indicates predictability of implied 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 …

increase in the idiosyncratic volatility of the underlying stock. This result can not be explained by standard risk factors. It … is distinct from existing anomalies in the stock market or volatility-related option mispricing. It is consistent with … idiosyncratic volatility stocks due to their higher arbitrage costs. Controlling for limits to arbitrage proxies reduces the …

We construct a global implied volatility surface by combining information from the index options of twenty countries …, including global level and slope, U.S. convexity, VIX, SVIX, variance risk premium, and left-tail volatility. The predictability … of global convexity comes from its left-tail contributions related to crash fears (left-tail volatility), and right …

structural stochastic volatility, which derives from different noise levels in the demand of fundamentalists and chartists and …

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 …