This is one odd market: How odd? Look at the SKEW

This is one odd market: How odd? Look at the SKEW

On one level the U.S. stock market makes perfect sense. The Standard & Poor’s 500 stock index is up 6.64% for 2017 and as you’d expect volatility has tumbled with the CBOE S&P 500 Volatility Index down 22.72% for the year. But another volatility index the CBOE SKEW Index is up 7.5% for 2017. How can two volatility indexes be giving such different pictures of the level of fear, nervousness, and expected volatility in the S&P 500?