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 days9.51%17.63%8.19%28.61% - 16-Aug4.09% - 19-Nov
20 days13.19%13.35%6.99%23.86% - 29-Aug4.97% - 19-Nov
30 days11.62%11.79%7.81%20.67% - 05-Sep5.56% - 27-Nov
  IMPLIED VOLATILITY Open Help
IV Index call Open Help10.73%12.81%10.08%22.21% - 05-Aug8.79% - 16-Dec
IV Index put Open Help10.87%12.79%10.18%22.58% - 05-Aug9.00% - 16-Dec
IV Index mean Open Help10.80%12.80%10.13%22.40% - 05-Aug8.89% - 16-Dec
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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