Hong Kong Dollar GAS-GARCH Student T Volatility Analysis
Volatility prediction for Friday, October 30th, 2026
1 Day
0.71%
decreased by 0.02%
1 Week
0.72%
decreased by 0.01%
1 Month
0.74%
increased by 0.01%
Analysis last updated: Thursday, October 29, 2026 at 07:09 PM UTC
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News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Sep 30, 2003 to Oct 23, 2026Model Insight
The estimated Student-t degrees of freedom v = 2.10 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 = 2.10 sits at the infinite-variance boundary
| Param | Value | t-stat |
|---|---|---|
| ωlong-run | 0.0194 | 2.00** |
| αscore | 0.1108 | 40.95*** |
| βpersistence | 0.9990 | 2,026.37*** |
| νDF | 2.0986 | 1,062.60*** |
0.999
Persistence693d
Half-life𝑓
GAS-GARCH-T Model
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| Parameter | Value | t-statistic |
|---|---|---|
ω long-run Long-run variance given a price move | 0.0194 | 2.00** |
α score Weight on the scaled score | 0.1108 | 40.95*** |
β persistence Volatility persistence | 0.9990 | 2,026.37*** |
ν DF Student-t tail thickness | 2.0986 | 1,062.60*** |
Persistence:
0.999
Half-life:
693 days
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