PSI 20 Portuguese Stock Index Spline-GARCH Volatility Analysis
Volatility prediction for Thursday, May 21st, 2026
1 Day
15.39%
increased by 0.10%
1 Week
15.63%
increased by 0.34%
1 Month
16.32%
increased by 1.03%
Analysis last updated: Thursday, May 21, 2026 at 02:18 AM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
| param | t-stat | |
|---|---|---|
| 0.8209 | 5.68 | |
| 0.1497 | 10.16 | |
| 0.8021 | 48.81 | |
| 0.0983 | 3.85 | |
| -0.2030 | -5.69 | |
| 0.1913 | 8.25 | |
| -0.1209 | -5.20 | |
| 0.0140 | 0.56 | |
| 0.0488 | 1.86 | |
| -0.0428 | -0.88 |
Estimation Period:
Dec 30, 1992 to May 15, 2026
Dec 30, 1992 to May 15, 2026
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