Implied volatility (IV). IV is often treated as the market’s best estimate of future uncertainty and risk. But just how accurate is it in predicting actual future price variation? Brett Friedman, Winhall Risk Analytics/OptionMetrics contributor, looks SPX and historical VIX data to calculate forward-looking volatility risk premium (VRP) for insights,

https://optionmetrics.com/blog/how-accurate-is-implied-volatility/