PSI 20 Portuguese Stock Index Zero Slope Spline-GARCH Volatility Analysis
Volatility prediction for Monday, April 13th, 2026
1 Day
15.73%
decreased by 1.13%
1 Week
16.01%
decreased by 0.85%
1 Month
16.80%
decreased by 0.06%
Analysis last updated: Friday, April 10, 2026 at 05:04 PM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
| param | t-stat | |
|---|---|---|
| 0.8084 | 5.55 | |
| 0.1496 | 10.14 | |
| 0.8029 | 49.28 | |
| 0.0954 | 3.68 | |
| -0.1985 | -5.48 | |
| 0.1876 | 7.99 | |
| -0.1160 | -4.93 | |
| 0.0093 | 0.38 | |
| 0.0496 | 2.14 | |
| -0.0355 | -2.15 |
Estimation Period:
Dec 30, 1992 to Apr 10, 2026
Dec 30, 1992 to Apr 10, 2026
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