V-Lab
FTSE 100 Index GJR-GARCH Volatility Analysis
Volatility prediction for Wednesday, August 26th, 2026
1 Day
8.43%
decreased by 0.11%
1 Week
8.87%
increased by 0.33%
1 Month
10.26%
increased by 1.72%
Analysis last updated: Tuesday, August 25, 2026 at 05:03 PM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Jan 1, 1990 to Aug 21, 2026Model Insight
This asset exhibits a strong leverage effect: volatility responds almost entirely to negative shocks. The ARCH response to positive shocks is negligible.
σ
GJR-GARCH Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.0217 | 21.55*** |
α ARCH Response to squared shocks | 0.0151 | 8.67*** |
β GARCH Volatility persistence | 0.8943 | 499.31*** |
γ leverage Additional response to negative shocks | 0.1372 | 27.16*** |
Persistence:
0.978
Half-life:
31 days
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