V-Lab
Grab Holdings Limited Zero Slope Spline-GARCH Volatility Analysis
Volatility prediction for Tuesday, August 25th, 2026
1 Day
35.81%
decreased by 1.25%
1 Week
36.74%
decreased by 0.32%
1 Month
38.94%
increased by 1.88%
Analysis last updated: Monday, August 24, 2026 at 09:25 PM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Oct 1, 2020 to Aug 21, 2026Model Insight
This model fits a time-varying baseline (a spline), so volatility mean-reverts toward a slowly-shifting long-run level rather than a constant. Short-run deviations decay with a half-life of 9 trading days.
τ
Zero Slope Spline-GARCH Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.3966 | 1.27 |
α ARCH Response to squared shocks | 0.1153 | 3.26*** |
β GARCH Volatility persistence | 0.8071 | 9.13*** |
Spline Coefficients
K=10
| γ1 | -12.2134 | -1.41 |
| γ2 | 22.7654 | 1.98** |
| γ3 | -20.3822 | -4.25*** |
| γ4 | 13.8847 | 3.11*** |
| γ5 | -5.8278 | -1.35 |
| γ6 | 1.5316 | 0.38 |
| γ7 | 5.7546 | 1.67* |
| γ8 | -11.6891 | -3.52*** |
| γ9 | 8.6909 | 2.36** |
| γ10 | -2.7407 | -1.06 |
Persistence:
0.922
Half-life:
9 days
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