Symbol:   
S&P 500 Index (SPX) 
Options Root:  Open Help    SPX   SPXQ   SPXW  
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Current1 WK AGO1 MO AGO52 wk Hi/Date52 wk Low/Date
  HISTORICAL VOLATILITY Open Help
10 days4.65%6.58%8.98%27.77% - 08-Jul4.18% - 09-Jun
20 days6.20%6.14%7.45%23.95% - 03-Feb4.76% - 02-Sep
30 days7.36%7.40%7.34%22.88% - 17-Feb5.15% - 23-Aug
  IMPLIED VOLATILITY Open Help
IV Index call Open Help8.60%8.88%9.71%25.62% - 11-Feb8.60% - 20-Jan
IV Index put Open Help8.40%8.62%9.29%25.48% - 11-Feb8.40% - 20-Jan
IV Index mean Open Help8.50%8.75%9.50%25.55% - 11-Feb8.50% - 20-Jan
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      SPX: DAILY 1 YEAR VOLATILITY CHART   ( 3 months    6 months    1 year )
    IV Index Call     IV Index Put     IV Index Call & Put     IV Index Mean
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Volatility chart
OPTIONS VOLUME, CONTRACTS
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Options volume chart