V-Lab
Miami International Hold Inc GJR-GARCH Volatility Analysis
Volatility prediction for Monday, September 14th, 2026
1 Day
41.82%
increased by 1.17%
1 Week
41.47%
increased by 0.82%
1 Month
41.38%
increased by 0.73%
Analysis last updated: Saturday, September 12, 2026 at 12:17 AM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Aug 14, 2025 to Sep 11, 2026Boundary Parameters
Model Insight
Volatility shocks decay with a half-life of 1 trading day, meaning a shock loses half its impact after approximately 1 day.
σ
GJR-GARCH Model
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Shock decay: Shocks decay with a 1-day half-life
| Param | Value | t-stat |
|---|---|---|
| ωconst | 5.0000 | 0.88 |
| αARCH | 0.0000 | 0.00 |
| βGARCH | 0.2290 | 0.28 |
| γleverage | 0.0677 | 0.26 |
0.263
Persistence1d
Half-lifeσ
GJR-GARCH Model
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| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 5.0000 | 0.88 |
α ARCH Response to squared shocks | 0.0000 | 0.00 |
β GARCH Volatility persistence | 0.2290 | 0.28 |
γ leverage Additional response to negative shocks | 0.0677 | 0.26 |
Persistence:
0.263
Half-life:
1 days
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