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

Volatility prediction for Friday, September 4th, 2026

1 Day

94.95%

decreased by 3.67%

1 Week

96.90%

decreased by 1.72%

1 Month

101.80%

increased by 3.18%

Analysis last updated: Friday, September 4, 2026 at 11:29 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 Aug 27, 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 = 5.41 degrees of freedom, capturing fatter tails than a normal distribution.

𝑓

GAS-GARCH-T Model

Tap to view equation

Shock decay: Shocks decay with a 10-day half-lifev = 5.41 · fat tails
ParamValuet-stat
ωconst47.3448
3.64***
αARCH0.1030
6.16***
βGARCH0.9314
44.96***
νDF5.4094
1.60

0.931

Persistence

10d

Half-life
𝑓

GAS-GARCH-T Model

Tap to view equation

ParameterValuet-statistic
ω

const

Unconditional variance weight

47.3448
3.64***
α

ARCH

Response to squared shocks

0.1030
6.16***
β

GARCH

Volatility persistence

0.9314
44.96***
ν

DF

Student-t tail thickness

5.4094
1.60

Persistence:

0.931

Half-life:

10 days