V-Lab
Union Bank of the Philippines Zero Slope Spline-GARCH Volatility Analysis
Volatility prediction for Monday, August 24th, 2026
1 Day
21.10%
decreased by 2.02%
1 Week
23.01%
decreased by 0.11%
1 Month
27.38%
increased by 4.26%
Analysis last updated: Friday, August 21, 2026 at 08:15 PM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Jun 30, 1992 to Aug 20, 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 10 trading days.
τ
Zero Slope Spline-GARCH Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 1.8837 | 4.21*** |
α ARCH Response to squared shocks | 0.2401 | 9.22*** |
β GARCH Volatility persistence | 0.6923 | 27.65*** |
Spline Coefficients
K=10
| γ1 | 0.0507 | 0.64 |
| γ2 | -0.0023 | -0.02 |
| γ3 | -0.1983 | -2.39** |
| γ4 | 0.3171 | 3.79*** |
| γ5 | -0.3412 | -4.56*** |
| γ6 | 0.3017 | 4.04*** |
| γ7 | -0.2319 | -2.42** |
| γ8 | 0.3153 | 2.99*** |
| γ9 | -0.3697 | -4.35*** |
| γ10 | 0.1866 | 3.41*** |
Persistence:
0.932
Half-life:
10 days
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