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 days14.46%19.02%23.05%113.50% - 24-Mar3.97% - 19-Nov
20 days16.82%20.36%22.76%94.25% - 27-Mar4.75% - 19-Nov
30 days18.49%23.44%19.30%82.96% - 08-Apr5.49% - 27-Nov
  IMPLIED VOLATILITY Open Help
IV Index call Open Help25.72%23.12%22.91%76.69% - 16-Mar8.89% - 16-Dec
IV Index put Open Help25.69%23.10%22.89%76.57% - 16-Mar8.83% - 16-Dec
IV Index mean Open Help25.71%23.11%22.90%76.63% - 16-Mar8.86% - 16-Dec
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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