V-Lab
GPT Group/The MF2-GARCH Volatility Analysis
Volatility prediction for Thursday, October 1st, 2026
1 Day
22.05%
1 Week
22.05%
1 Month
22.06%
Analysis last updated: Thursday, October 1, 2026 at 06:08 PM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Jan 1, 1990 to Sep 25, 2026Model Insight
With persistence 0.991, volatility shocks have a half-life of 78 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 238% more than positive returns
MF2-GARCH Model
Tap to view equation
| Param | Value | t-stat |
|---|---|---|
| mwindow | 126 | |
| αARCH | 0.0219 | 3.80*** |
| βGARCH | 0.9432 | 134.55*** |
| γleverage | 0.0521 | 5.20*** |
| λ₁tau intercept | 0.0165 | 0.56 |
| λ₂forecast adj. | 0.0000 | 0.00 |
| λ₃tau persistence | 0.9915 | 76.86*** |
0.991
Persistence78d
Half-lifeMF2-GARCH Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
m window Rolling window length | 126 | |
α ARCH Response to squared shocks | 0.0219 | 3.80*** |
β GARCH Volatility persistence | 0.9432 | 134.55*** |
γ leverage Additional response to negative shocks | 0.0521 | 5.20*** |
λ₁ tau intercept Baseline long-term coefficient | 0.0165 | 0.56 |
λ₂ forecast adj. Forecast performance sensitivity | 0.0000 | 0.00 |
λ₃ tau persistence Long-term factor persistence | 0.9915 | 76.86*** |
Persistence:
0.991
Half-life:
78 days
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