(redirected from Implied Standard Deviation)
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References in periodicals archive ?
Thus, they concluded that weighted implied standard deviation (WISD) is considerably better estimator of future volatility than historical standard deviation (HSD).
Which one out of these three volatility measures: (i) Historical Standard Deviation (HSD) (ii) Weighted Implied Standard Deviation (^VISD), and (iii) Average Implied Standard Deviation (AISD), is the best predictor of true volatility of the underlying asset.
i) Average Implied Standard Deviation (AISD), and (ii) Weighted Implied Standard Deviation (WISD).
Where, N = the number of options recorded under an option class on a given date, Wj = the current option price of the index, ISDj = implied standard deviation of option j, (dWj x ?
For each option on day t, we first employ the dividend-adjusted Black-Scholes model to calculate an implied standard deviation for the same option from the previous trading day.
Both the mean call price elasticity and implied standard deviation are somewhat lower for the options in the current expiration cycle, while the mean time to expiration is somewhat longer.