PMA Graphene Technology Group Inc Zero Slope Spline-GARCH Volatility Analysis
Volatility prediction for Monday, October 26th, 2026
1 Day
52.09%
decreased by 3.85%
1 Week
66.22%
increased by 10.28%
1 Month
77.67%
increased by 21.73%
Analysis last updated: Friday, October 23, 2026 at 10:32 PM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Nov 22, 2024 to Oct 23, 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 2 trading days.
τ
Zero Slope Spline-GARCH Model
Tap to view equation
Time-varying baseline: volatility reverts to a slowly-shifting spline trend
| Param | Value | t-stat |
|---|---|---|
| ωconst | 1.8405 | 2.85*** |
| αARCH | 0.5029 | 2.48** |
| βGARCH | 0.2243 | 1.64 |
Spline Coefficients
K=5
| γ1 | 3.9075 | 0.44 |
| γ2 | -6.6369 | -0.46 |
| γ3 | 9.9145 | 0.98 |
| γ4 | -18.9873 | -2.29** |
| γ5 | 18.6814 | 3.11*** |
0.727
Persistence2d
Half-lifeτ
Zero Slope Spline-GARCH Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 1.8405 | 2.85*** |
α ARCH Response to squared shocks | 0.5029 | 2.48** |
β GARCH Volatility persistence | 0.2243 | 1.64 |
Spline Coefficients
K=5
| γ1 | 3.9075 | 0.44 |
| γ2 | -6.6369 | -0.46 |
| γ3 | 9.9145 | 0.98 |
| γ4 | -18.9873 | -2.29** |
| γ5 | 18.6814 | 3.11*** |
Persistence:
0.727
Half-life:
2 days
Other PMA Graphene Technology Group Inc Analyses
Other Zero Slope Spline-GARCH Analyses on Equities