Symbol:    
SPDR S&P 500 ETF Trust 
Options Root:  Open Help    SPY  
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Current1 WK AGO1 MO AGO52 wk Hi/Date52 wk Low/Date
  HISTORICAL VOLATILITY Open Help
10 days5.54%5.51%18.58%40.73% - 04-Jan4.36% - 19-Sep
20 days5.60%7.39%13.89%31.25% - 07-Jan5.13% - 30-Apr
30 days10.90%11.87%12.68%29.23% - 04-Jan7.30% - 06-May
  IMPLIED VOLATILITY Open Help
IV Index call Open Help11.17%10.96%13.96%32.24% - 24-Dec9.78% - 12-Apr
IV Index put Open Help10.94%10.77%13.87%30.89% - 24-Dec9.64% - 12-Apr
IV Index mean Open Help11.05%10.87%13.92%31.57% - 24-Dec9.71% - 12-Apr
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      SPY: 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