Historical Volatility (Close-to-Close) (180-Day)

Historical Volatility (Close-to-Close): The past volatility of the security over the selected time frame, calculated using the closing price on each trading day.

AT&T Inc. (T) had 180-Day Historical Volatility (Close-to-Close) of 0.4729 for 2020-07-01.

10-Day 20-Day 30-Day 60-Day
90-Day 120-Day 150-Day 180-Day

Figures for 2020-07-01

Volatility Metrics
Historical Volatility (Close-to-Close)	0.4729
Historical Volatility (Parkinson)	0.3266
Implied Volatility (Calls)	0.3029
Implied Volatility (Puts)	0.2654
Implied Volatility (Mean)	0.2842
Put-Call Implied Volatility Ratio	0.8762
Implied Volatility Skew	0.0599
Option Statistics
Put-Call Ratio (Volume)	0.5492
Put-Call Ratio (Open Interest)	0.9518
Forward Price	29.11
Call Breakeven Price	36.12
Put Breakeven Price	25.96
Option Breakeven Price	31.11

Data from Quantcha