PSI 20 Portuguese Stock Index Zero Slope Spline-GARCH Volatility Analysis
Volatility Prediction for Monday, December 22nd, 2025:12.28% (+0.23%)
Parameter Estimates
| param | t-stat | |
|---|---|---|
| 0.8189 | 5.61 | |
| 0.1549 | 10.44 | |
| 0.7967 | 48.49 | |
| 0.0992 | 3.83 | |
| -0.2049 | -5.65 | |
| 0.1902 | 7.98 | |
| -0.1134 | -4.68 | |
| 0.0046 | 0.18 | |
| 0.0495 | 2.21 | |
| -0.0309 | -2.03 |
Estimation Period:
Dec 30, 1992 to Dec 19, 2025
Dec 30, 1992 to Dec 19, 2025
News Impact Curve
Volatility Forecasts
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