V-Lab
Hong Kong Dollar GAS-GARCH Student T Volatility Analysis
Volatility prediction for Wednesday, August 19th, 2026
1 Day
5.35%
increased by 0.84%
1 Week
5.42%
increased by 0.91%
1 Month
5.67%
increased by 1.16%
Analysis last updated: Tuesday, August 18, 2026 at 07:42 PM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Sep 30, 2003 to Aug 14, 2026Model 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 | 1.5312 | 9.37*** |
α ARCH Response to squared shocks | 0.0897 | 161.85*** |
β GARCH Volatility persistence | 0.9990 | 9,605.77*** |
ν DF Student-t tail thickness | 2.0008 |
Persistence:
0.999
Half-life:
693 days
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