Several simultaneously visible charts placed under each other, allow determining interrelation between different indicators visually. Distributions (histograms) for finer analysis are available for historical and implied volatility and other indicators. AAPL Implied Volatility Implied volatility (IV) is the market's expectation of future volatility. In the following charts, you can compare IV against historical stock volatility, as well as see a term structure of both past and current IV with 30-day, 60-day, 90-day and 120-day constant maturity. Implied volatility (IV) is the market's expectation of future volatility. In the following charts, you can compare IV against historical stock volatility, as well as see a term structure of both past and current IV with 30-day, 60-day, 90-day and 120-day constant maturity. ▲ Close. Historical IV -vs- RealizedIV Term Structure.