Skip to main content
V-Lab

FTSE 100 Index GAS-GARCH Student T Volatility Analysis

Volatility prediction for Monday, August 17th, 2026

1 Day

8.54%

decreased by 0.26%

1 Week

8.87%

increased by 0.07%

1 Month

9.97%

increased by 1.17%

Analysis last updated: Friday, August 14, 2026 at 05:04 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 Aug 14, 2026

Model Insight

Volatility shocks decay with a half-life of 47 trading days, meaning a shock loses half its impact after approximately 47 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

1.0667
9.94***
α

ARCH

Response to squared shocks

0.0877
34.29***
β

GARCH

Volatility persistence

0.9852
619.65***
ν

DF

Student-t tail thickness

8.9326
5.47***

Persistence:

0.985

Half-life:

47 days