V-Lab
Phihong Technology GJR-GARCH Volatility Analysis
Volatility prediction for Monday, July 27th, 2026
1 Day
48.62%
decreased by 1.06%
1 Week
48.26%
decreased by 1.42%
1 Month
47.23%
decreased by 2.45%
Analysis last updated: Sunday, July 26, 2026 at 05:39 AM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
May 21, 2001 to Jul 24, 2026Model Insight
Volatility shocks decay with a half-life of 12 trading days, meaning a shock loses half its impact after approximately 12 days.
σ
GJR-GARCH Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.4455 | 16.63*** |
α ARCH Response to squared shocks | 0.0864 | 16.60*** |
β GARCH Volatility persistence | 0.8577 | 174.72*** |
γ leverage Additional response to negative shocks | 0.0012 | 0.14 |
Persistence:
0.945
Half-life:
12 days
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