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V-Lab

FTSE 100 Implied Volatility Index 30 Days GAS-GARCH Student T Volatility Analysis

Volatility prediction for Friday, August 21st, 2026

1 Day

91.80%

decreased by 1.73%

1 Week

94.20%

increased by 0.67%

1 Month

100.24%

increased by 6.71%

Analysis last updated: Friday, August 21, 2026 at 08:22 PM UTC

Date Range:

from

to

6M ·

1Y ·

2Y ·

5Y ·

10Y ·

All

graph of FTSE 100 Implied Volatility Index 30 Days GAS-GARCH-T

News Impact Curve

How returns affect tomorrow's volatility

Volatility Forecast

How volatility evolves over time

Parameter Estimates

Jan 3, 2000 to Apr 2, 2026

Model Insight

Volatility shocks decay with a half-life of 10 trading days, meaning a shock loses half its impact after approximately 10 days. Returns follow a Student-t distribution with v = 5.43 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

47.5967
14.35***
α

ARCH

Response to squared shocks

0.1013
24.55***
β

GARCH

Volatility persistence

0.9332
182.41***
ν

DF

Student-t tail thickness

5.4304
6.32***

Persistence:

0.933

Half-life:

10 days