V-Lab
QVC Group Inc GJR-GARCH Volatility Analysis
Volatility prediction for Monday, July 27th, 2026
1 Day
287.10%
decreased by 3.88%
1 Week
286.97%
decreased by 4.01%
1 Month
286.45%
decreased by 4.53%
Analysis last updated: Saturday, July 25, 2026 at 09:26 AM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
May 5, 2006 to Jul 24, 2026Model Insight
With persistence 0.999, volatility shocks have a half-life of 1298 trading days (~5.1 years), close to a unit root, so long-run forecasts are highly sensitive to this estimate.
Leverage: volatility responds almost entirely to negative shocks
σ
GJR-GARCH Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.0261 | 5.08*** |
α ARCH Response to squared shocks | 0.0081 | 3.05*** |
β GARCH Volatility persistence | 0.9726 | 584.13*** |
γ leverage Additional response to negative shocks | 0.0375 | 9.25*** |
Persistence:
0.999
Half-life:
1298 days
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