V-Lab
Ashika Global Securities Ltd Zero Slope Spline-GARCH Volatility Analysis
Volatility prediction for Friday, September 11th, 2026
1 Day
16.62%
decreased by 3.04%
1 Week
16.63%
decreased by 3.03%
1 Month
16.67%
decreased by 2.99%
Analysis last updated: Friday, September 11, 2026 at 07:37 PM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
May 8, 2013 to Sep 4, 2026Model Insight
With persistence 0.999, volatility shocks have a half-life of 476 trading days (~1.9 years), close to a unit root, so long-run forecasts are highly sensitive to this estimate.
τ
Zero Slope Spline-GARCH Model
Tap to view equation
High persistence: persistence 0.999, shock half-life ~476 days
| Param | Value | t-stat |
|---|---|---|
| ωconst | 4.4635 | 2.08** |
| αARCH | 0.3072 | 6.29*** |
| βGARCH | 0.6913 | 68.34*** |
Spline Coefficients
K=9
| γ1 | -4.5216 | -0.19 |
| γ2 | 20.9702 | 0.73 |
| γ3 | -52.8951 | -5.58*** |
| γ4 | 97.6757 | 21.08*** |
| γ5 | -132.7889 | -34.00*** |
| γ6 | 133.8481 | 19.97*** |
| γ7 | -102.5135 | -14.51*** |
| γ8 | 63.2209 | 3.89*** |
| γ9 | -31.9770 | -2.22** |
0.999
Persistence476d
Half-lifeτ
Zero Slope Spline-GARCH Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 4.4635 | 2.08** |
α ARCH Response to squared shocks | 0.3072 | 6.29*** |
β GARCH Volatility persistence | 0.6913 | 68.34*** |
Spline Coefficients
K=9
| γ1 | -4.5216 | -0.19 |
| γ2 | 20.9702 | 0.73 |
| γ3 | -52.8951 | -5.58*** |
| γ4 | 97.6757 | 21.08*** |
| γ5 | -132.7889 | -34.00*** |
| γ6 | 133.8481 | 19.97*** |
| γ7 | -102.5135 | -14.51*** |
| γ8 | 63.2209 | 3.89*** |
| γ9 | -31.9770 | -2.22** |
Persistence:
0.999
Half-life:
476 days
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