National Grid Transco, PLC (NGG)

Last Closing Price: 70.88 (2025-09-16)

Historical Volatility (Parkinson) (150-Day)

Historical Volatility (Parkinson): The past volatility of the security over the selected time frame, calculated using the high and low prices on each trading day.

National Grid Transco, PLC (NGG) had 150-Day Historical Volatility (Parkinson) of 0.1153 for 2025-09-16.