CBOE Volatility Index

CBOE NASDAQ-100 Volatility Index

CBOE DJIA Volatility Index

CBOE Russell 2000 Volatility Index

CBOE S&P 500 9-Day Volatility Index

CBOE 3-Month Volatility Index

CBOE 1-Day Volatility Index

CBOE S&P 500 6-Month Volatility Index

CBOE S&P 500 One-Year Volatility Index

CBOE Skew Index

How volatility evolves over time

How illiquidity evolves over time

{name} Model Equation

How returns affect tomorrow's volatility

How returns affect tomorrow's illiquidity

Spline Coefficients

Value at Risk (VaR) estimates the maximum loss at a given confidence level. Expected Shortfall (ES) estimates the average loss beyond VaR.

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Param	Value	t-stat
ωlong-run	3.1399	1.07
αscore	0.0688	9.00***
βpersistence	0.9925	142.26***
νDF	6.0957	2.04**

Parameter	Value	t-statistic
ω long-run Long-run variance given a price move	3.1399	1.07
α score Weight on the scaled score	0.0688	9.00***
β persistence Volatility persistence	0.9925	142.26***
ν DF Student-t tail thickness	6.0957	2.04**

V-Lab

AT&T Inc GAS-GARCH Student T Volatility Analysis

Date Range:

News Impact Curve

Volatility Forecast

Parameter Estimates

Other AT&T Inc Analyses