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V-Lab
V-Lab

FTSE 100 Implied Volatility Index 30 Days Zero Slope Spline-GARCH Volatility Analysis

Volatility prediction for Friday, September 18th, 2026

1 Day

110.90%

increased by 16.70%

1 Week

108.28%

increased by 14.08%

1 Month

104.39%

increased by 10.19%

Analysis last updated: Friday, September 18, 2026 at 10:10 PM UTC

Date Range:

from

to

6M ·

1Y ·

2Y ·

5Y ·

10Y ·

All

graph of FTSE 100 Implied Volatility Index 30 Days S0GARCH

News Impact Curve

How returns affect tomorrow's volatility

Volatility Forecast

How volatility evolves over time

Parameter Estimates

Jan 3, 2000 to Sep 10, 2026

Model Insight

This model fits a time-varying baseline (a spline), so volatility mean-reverts toward a slowly-shifting long-run level rather than a constant. Short-run deviations decay with a half-life of 3 trading days.

τ

Zero Slope Spline-GARCH Model

Tap to view equation

Time-varying baseline: volatility reverts to a slowly-shifting spline trend
ParamValuet-stat
ωconst0.8905
14.66***
αARCH0.1498
6.29***
βGARCH0.6668
15.17***
γi Spline Coefficients
K=3
γ10.0117
2.91***
γ2-0.0222
-3.64***
γ30.0143
4.46***

0.817

Persistence

3d

Half-life
τ

Zero Slope Spline-GARCH Model

Tap to view equation

ParameterValuet-statistic
ω

const

Unconditional variance weight

0.8905
14.66***
α

ARCH

Response to squared shocks

0.1498
6.29***
β

GARCH

Volatility persistence

0.6668
15.17***
γi Spline Coefficients
K=3
γ10.0117
2.91***
γ2-0.0222
-3.64***
γ30.0143
4.46***

Persistence:

0.817

Half-life:

3 days