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V-Lab

FTSE 100 Index GAS-GARCH Student T Volatility Analysis

Volatility prediction for Monday, July 20th, 2026

1 Day

9.72%

decreased by 0.33%

1 Week

9.98%

decreased by 0.07%

1 Month

10.87%

increased by 0.82%

Analysis last updated: Friday, July 17, 2026 at 05:05 PM UTC

Date Range:

from

to

6M ·

1Y ·

2Y ·

5Y ·

10Y ·

All

graph of FTSE 100 Index GAS-GARCH-T

News Impact Curve

How returns affect tomorrow's volatility

Volatility Forecast

How volatility evolves over time

Parameter Estimates

Jan 1, 1990 to Jul 17, 2026

Model Insight

Volatility shocks decay with a half-life of 46 trading days, meaning a shock loses half its impact after approximately 46 days. Returns follow a Student-t distribution with v = 8.93 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

1.0678
9.95***
α

ARCH

Response to squared shocks

0.0876
34.22***
β

GARCH

Volatility persistence

0.9852
618.44***
ν

DF

Student-t tail thickness

8.9259
5.45***

Persistence:

0.985

Half-life:

46 days