In February, 2011, CBOE introduced the S & P 500 SKEW Index, as another means for investors to gauge market volatility and the potential risk of a "black swan" type of event. The SKEW Index is an option-based indicator that measures the perceived tail risk of the distribution of S & P 500 returns in the next 30 days. "Tail risk" … [Read more...] about What does the SKEW Index Mean to Options Traders?
standard deviation curve
