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 days8.09%5.66%4.11%27.77% - 08-Jul3.97% - 21-Feb
20 days8.20%7.17%5.17%20.46% - 08-Jul4.61% - 28-Feb
30 days7.35%6.45%5.49%16.89% - 22-Jul5.15% - 23-Aug
  IMPLIED VOLATILITY Open Help
IV Index call Open Help10.42%8.60%8.98%21.83% - 24-Jun8.05% - 27-Jan
IV Index put Open Help10.09%8.26%8.57%19.94% - 27-Jun8.07% - 17-Mar
IV Index mean Open Help10.26%8.43%8.78%20.63% - 24-Jun8.15% - 27-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