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 days4.28%4.76%4.65%27.77% - 08-Jul3.97% - 21-Feb
20 days5.77%6.23%6.20%21.24% - 22-Feb4.76% - 02-Sep
30 days5.61%5.76%7.36%22.22% - 25-Feb5.15% - 23-Aug
  IMPLIED VOLATILITY Open Help
IV Index call Open Help9.15%8.61%8.60%21.83% - 24-Jun8.05% - 27-Jan
IV Index put Open Help9.07%8.55%8.40%19.94% - 27-Jun8.24% - 27-Jan
IV Index mean Open Help9.11%8.58%8.50%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