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V-Lab
V-Lab

IBEX 35 Index GARCH Volatility Analysis

Volatility prediction for Tuesday, September 22nd, 2026

1 Day

16.55%

increased by 0.23%

1 Week

16.81%

increased by 0.49%

1 Month

17.71%

increased by 1.39%

Analysis last updated: Monday, September 21, 2026 at 04:04 PM UTC

Date Range:

from

to

6M ·

1Y ·

2Y ·

5Y ·

10Y ·

All

graph of IBEX 35 Index GARCH

News Impact Curve

How returns affect tomorrow's volatility

Volatility Forecast

How volatility evolves over time

Parameter Estimates

Jan 2, 1990 to Sep 18, 2026

Model Insight

Volatility shocks decay with a half-life of 30 trading days, meaning a shock loses half its impact after approximately 30 days.

σ

GARCH Model

Tap to view equation

Shock decay: Shocks decay with a 30-day half-life
ParamValuet-stat
ωconst0.0426
5.47***
αARCH0.1084
8.76***
βGARCH0.8691
84.93***

0.977

Persistence

30d

Half-life
σ

GARCH Model

Tap to view equation

ParameterValuet-statistic
ω

const

Unconditional variance weight

0.0426
5.47***
α

ARCH

Response to squared shocks

0.1084
8.76***
β

GARCH

Volatility persistence

0.8691
84.93***

Persistence:

0.977

Half-life:

30 days