Skip to main content
V-Lab

CBOE VIX Indicative Ask Index GAS-GARCH Student T Volatility Analysis

Volatility prediction for Friday, July 24th, 2026

1 Day

140.11%

increased by 24.06%

1 Week

135.51%

increased by 19.46%

1 Month

127.79%

increased by 11.74%

Analysis last updated: Friday, July 24, 2026 at 11:36 AM UTC

Date Range:

from

to

6M ·

1Y ·

2Y ·

5Y ·

10Y ·

All

graph of CBOE VIX Indicative Ask Index GAS-GARCH-T

News Impact Curve

How returns affect tomorrow's volatility

Volatility Forecast

How volatility evolves over time

Parameter Estimates

Sep 18, 2009 to Jul 17, 2026

Model Insight

Volatility shocks decay with a half-life of 4 trading days, meaning a shock loses half its impact after approximately 4 days. Returns follow a Student-t distribution with v = 4.74 degrees of freedom, capturing fatter tails than a normal distribution.

𝑓

GAS-GARCH-T Model

Tap to view equation

ParameterValuet-statistic
ω

const

Unconditional variance weight

59.4657
16.34***
α

ARCH

Response to squared shocks

0.1655
17.88***
β

GARCH

Volatility persistence

0.8397
80.67***
ν

DF

Student-t tail thickness

4.7446
7.11***

Persistence:

0.840

Half-life:

4 days