V-Lab
Spenda Ltd GJR-GARCH Volatility Analysis
High-persistence model: shocks decay very slowly, so the theoretical long-run value may not be practically meaningful
Volatility prediction for Wednesday, August 5th, 2026
1 Day
307.28%
1 Week
307.32%
1 Month
307.51%
Analysis last updated: Wednesday, August 5, 2026 at 05:53 PM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
May 29, 2002 to Jul 31, 2026Model Insight
Estimated persistence of 1.000 is at or above 1 (non-stationary): volatility shocks do not decay and the long-run variance is undefined, so long-horizon forecasts should be treated with caution.
Leverage: volatility responds almost entirely to negative shocks
GJR-GARCH Model
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| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.0583 | 1.95* |
α ARCH Response to squared shocks | 0.0081 | 2.90*** |
β GARCH Volatility persistence | 0.9710 | 400.75*** |
γ leverage Additional response to negative shocks | 0.0417 | 12.54*** |
Persistence:
1.000
Half-life:
-
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