V-Lab
Ashika Global Securities Ltd Spline-GARCH Volatility Analysis
High-persistence model: shocks decay very slowly, so the theoretical long-run value may not be practically meaningful
Volatility prediction for Friday, September 11th, 2026
1 Day
26.00%
decreased by 1.99%
1 Week
30.73%
increased by 2.74%
1 Month
44.92%
increased by 16.93%
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 1.000, volatility shocks have a half-life of 77016 trading days (~305.6 years), close to a unit root, so long-run forecasts are highly sensitive to this estimate.
τ
Spline-GARCH Model
Tap to view equation
High persistence: persistence 1.000, shock half-life ~77016 days
| Param | Value | t-stat |
|---|---|---|
| ωconst | 0.1218 | 0.09 |
| αARCH | 0.3191 | 0.05 |
| βGARCH | 0.6809 | 0.11 |
Spline Coefficients
K=9
| γ1 | -7.9271 | -0.01 |
| γ2 | 32.3821 | 0.01 |
| γ3 | -73.9280 | -0.03 |
| γ4 | 127.3171 | 0.09 |
| γ5 | -165.1821 | -0.46 |
| γ6 | 158.9706 | 0.30 |
| γ7 | -114.9673 | -0.04 |
| γ8 | 67.4578 | 0.01 |
| γ9 | -35.7022 | -0.01 |
1.000
Persistence77016d
Half-lifeτ
Spline-GARCH Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.1218 | 0.09 |
α ARCH Response to squared shocks | 0.3191 | 0.05 |
β GARCH Volatility persistence | 0.6809 | 0.11 |
Spline Coefficients
K=9
| γ1 | -7.9271 | -0.01 |
| γ2 | 32.3821 | 0.01 |
| γ3 | -73.9280 | -0.03 |
| γ4 | 127.3171 | 0.09 |
| γ5 | -165.1821 | -0.46 |
| γ6 | 158.9706 | 0.30 |
| γ7 | -114.9673 | -0.04 |
| γ8 | 67.4578 | 0.01 |
| γ9 | -35.7022 | -0.01 |
Persistence:
1.000
Half-life:
77016 days
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