V-Lab
Zhihu Inc GJR-GARCH Volatility Analysis
Volatility prediction for Friday, September 11th, 2026
1 Day
82.07%
decreased by 13.51%
1 Week
81.91%
decreased by 13.67%
1 Month
81.48%
decreased by 14.10%
Analysis last updated: Friday, September 11, 2026 at 07:17 PM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Apr 22, 2022 to Sep 4, 2026Model Insight
Volatility shocks decay with a half-life of 11 trading days, meaning a shock loses half its impact after approximately 11 days.
σ
GJR-GARCH Model
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Shock decay: Shocks decay with a 11-day half-life
| Param | Value | t-stat |
|---|---|---|
| ωconst | 1.6493 | 2.80*** |
| αARCH | 0.2325 | 2.30** |
| βGARCH | 0.6704 | 10.69*** |
| γleverage | 0.0665 | 0.24 |
0.936
Persistence11d
Half-lifeσ
GJR-GARCH Model
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| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 1.6493 | 2.80*** |
α ARCH Response to squared shocks | 0.2325 | 2.30** |
β GARCH Volatility persistence | 0.6704 | 10.69*** |
γ leverage Additional response to negative shocks | 0.0665 | 0.24 |
Persistence:
0.936
Half-life:
11 days
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