Cboe SKEW Index (SKEW)
The skewness of a rate of return indicates returns around 0. Negative skewness entails The Cboe SKEW IndexSM (SKEW) estimates the skewness of S&P 500® returns at the end of a 30-day horizon. Similar to VIX® the price of S&P 500 tail risk is calculated from the prices of S&P 500 out-of-the-money options. SKEW typically ranges from 100 to 150.