V-Lab
Mexican Stock Exchange Mexican Bolsa IPC Index GJR-GARCH Volatility Analysis
Volatility prediction for Tuesday, September 15th, 2026
1 Day
14.15%
decreased by 0.45%
1 Week
14.49%
decreased by 0.11%
1 Month
15.73%
increased by 1.13%
Analysis last updated: Monday, September 14, 2026 at 11:04 PM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Jan 2, 1990 to Sep 11, 2026Model Insight
With persistence 0.991, volatility shocks have a half-life of 74 trading days (~0.3 years), close to a unit root, so long-run forecasts are highly sensitive to this estimate.
Leverage: Negative returns increase volatility 246% more than positive returns
σ
GJR-GARCH Model
Tap to view equation
High persistence: persistence 0.991, shock half-life ~74 daysLeverage: Negative returns increase volatility 246% more than positive returns
| Param | Value | t-stat |
|---|---|---|
| ωconst | 0.0273 | 5.63*** |
| αARCH | 0.0424 | 5.53*** |
| βGARCH | 0.8962 | 111.49*** |
| γleverage | 0.1042 | 4.18*** |
0.991
Persistence74d
Half-lifeσ
GJR-GARCH Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.0273 | 5.63*** |
α ARCH Response to squared shocks | 0.0424 | 5.53*** |
β GARCH Volatility persistence | 0.8962 | 111.49*** |
γ leverage Additional response to negative shocks | 0.1042 | 4.18*** |
Persistence:
0.991
Half-life:
74 days
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