V-Lab
QVC Group Inc 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, June 24th, 2026
1 Day
2,449.76%
increased by 845.29%
1 Week
2,449.88%
increased by 845.41%
1 Month
2,450.36%
increased by 845.89%
Analysis last updated: Wednesday, June 24, 2026 at 03:03 PM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
May 10, 2006 to May 15, 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.
σ
GJR-GARCH Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 1.1842 | 5.96*** |
α ARCH Response to squared shocks | 0.1305 | 6.36*** |
β GARCH Volatility persistence | 0.7747 | 26.64*** |
γ leverage Additional response to negative shocks | 0.1897 | 1.24 |
Persistence:
1.000
Half-life:
-
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