V-Lab
Visa Chrome Ltd GAS-GARCH Student T Volatility Analysis
Volatility prediction for Monday, July 27th, 2026
1 Day
1,374.83%
increased by 108.51%
1 Week
1,375.48%
increased by 109.16%
1 Month
1,378.06%
increased by 111.74%
Analysis last updated: Sunday, July 26, 2026 at 02:18 AM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Jul 27, 2006 to Jul 24, 2026Extended Optimization
Boundary Parameters
Model Insight
The estimated Student-t degrees of freedom v = 2.00 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
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 11,054.7400 | 8.46*** |
α ARCH Response to squared shocks | 0.1205 | 159.99*** |
β GARCH Volatility persistence | 0.9990 | 8,394.96*** |
ν DF Student-t tail thickness | 2.0012 |
Persistence:
0.999
Half-life:
693 days
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