( from seeking alpha - The Dow Jones industrials fell 634.76 points, the first trading day since Standard & Poor's downgraded American debt. . It was the sixth-worst point decline for the Dow in the last 112 years and the worst drop since December 2008. Every stock in the Standard & Poor's 500 index declined Monday.)
Investopedia Says:
The first VIX, introduced by the CBOE in 1993, was a weighted measure of the implied volatility of eight S&P 100 at-the-money put and call options. Ten years later, it expanded to use options based on a broader index, the S&P 500, which allows for a more accurate view of investors' expectations on future market volatility. VIX values greater than 30 are generally associated with a large amount of volatility as a result of investor fear or uncertainty, while values below 20 generally correspond to less stressful, even complacent, times in the markets.
Read more: http://www.answers.com/topic/vix-cboe-volatility-index#ixzz1UU0R8gSS
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