V-Lab
QVC Group Inc GAS-GARCH Student T Volatility Analysis
Inactive
Last recorded values (Wednesday, June 24th, 2026):
1 Day
5,872.63%
1 Week
5,850.68%
1 Month
5,764.28%
Analysis last updated: Wednesday, September 2, 2026 at 04:11 PM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
May 10, 2006 to Jun 23, 2026Extended Optimization
Model Insight
The estimated Student-t degrees of freedom v = 2.01 sit at the infinite-variance boundary (v → 2): the model is attributing extreme moves to heavy tails rather than to volatility, so the volatility scale is unreliable here. See the boundary-parameters flag.
𝑓
GAS-GARCH-T Model
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Unreliable tails: v = 2.01 sits at the infinite-variance boundary
| Param | Value | t-stat |
|---|---|---|
| ωconst | 1,856.7426 | 1.88* |
| αARCH | 0.0665 | 22.75*** |
| βGARCH | 0.9962 | 515.90*** |
| νDF | 2.0074 | 5,702.89*** |
0.996
Persistence182d
Half-life𝑓
GAS-GARCH-T Model
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| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 1,856.7426 | 1.88* |
α ARCH Response to squared shocks | 0.0665 | 22.75*** |
β GARCH Volatility persistence | 0.9962 | 515.90*** |
ν DF Student-t tail thickness | 2.0074 | 5,702.89*** |
Persistence:
0.996
Half-life:
182 days
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