Shanghai Chlor-Alkali Chemical Co Ltd GAS-GARCH Student T Volatility Analysis
Volatility prediction for Tuesday, July 21st, 2026
1 Day
172.14%
increased by 16.21%
1 Week
184.88%
increased by 28.95%
1 Month
227.84%
increased by 71.91%
Analysis last updated: Tuesday, July 21, 2026 at 06:12 PM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Aug 20, 1992 to Jul 17, 2026Model 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
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 2,427.4540 | 6.87*** |
α ARCH Response to squared shocks | 0.1323 | 205.36*** |
β GARCH Volatility persistence | 0.9961 | 1,762.97*** |
ν DF Student-t tail thickness | 2.0068 |
Persistence:
0.996
Half-life:
176 days
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