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 days13.44%9.92%13.72%37.15% - 10-Nov6.88% - 26-Jul
20 days12.34%11.53%11.52%31.18% - 10-Nov7.94% - 26-Jul
30 days12.61%11.03%10.79%30.72% - 10-Nov9.03% - 01-Aug
  IMPLIED VOLATILITY Open Help
IV Index call Open Help16.30%11.93%13.11%30.71% - 11-Oct10.31% - 14-Sep
IV Index put Open Help16.34%11.92%13.11%30.77% - 12-Oct10.31% - 14-Sep
IV Index mean Open Help16.32%11.92%13.11%30.74% - 11-Oct10.31% - 14-Sep
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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