SONACOMS volatility
ATM IV
30.2%
HV 20d
42.4%
HV 30d
40.2%
IV percentile
27
IV rank
33
Implied vs historical volatility
ATM IVHV 20d
Put-call ratio (open interest)
As of 02 Nov 2026. ATM IV = mean of call and put IV at the strike nearest the parity forward, nearest expiry with ≥ 7 days left; HV = annualised close-to-close st.dev. (split/bonus ex-dates excluded); IVP = % of sessions in the window with lower IV; IVR = position between the window low and high. Source: NSE F&O bhavcopy + equity/index closes.