Implied Volatility (Calls) (120-Day)
Implied Volatility (Calls): The forecasted future volatility of the security over the selected time frame, derived from the pricing of the at-the-money call options with the relevant expiration date.
National Grid Transco, PLC (NGG) had 120-Day Implied Volatility (Calls) of 0.1705 for 2025-10-29.
For much more extensive volatility insights, check out our new product VolVue:
- Over 300 data fields encompassing historical volatility, implied volatility, and put-call ratios for multiple time frames
- Download data in CSV, Excel, JSON, or XML format
- Up to 20 years of data history
- 52-Week Rank and Percentile for all metrics and time frames