PSI 20 Portuguese Stock Index Zero Slope Spline-GARCH Volatility Analysis
Volatility prediction for Monday, May 4th, 2026
1 Day
15.47%
increased by 2.14%
1 Week
15.77%
increased by 2.44%
1 Month
16.63%
increased by 3.30%
Analysis last updated: Thursday, April 30, 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 | |
|---|---|---|
| 0.8071 | 5.54 | |
| 0.1499 | 10.16 | |
| 0.8024 | 49.28 | |
| 0.0946 | 3.66 | |
| -0.1972 | -5.46 | |
| 0.1872 | 8.01 | |
| -0.1168 | -5.00 | |
| 0.0109 | 0.45 | |
| 0.0483 | 2.08 | |
| -0.0348 | -2.12 |
Estimation Period:
Dec 30, 1992 to Apr 30, 2026
Dec 30, 1992 to Apr 30, 2026
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