S&P MidCap 400 Index GAS-GARCH Student T Volatility Analysis
Volatility prediction for Tuesday, April 21st, 2026
1 Day
18.37%
decreased by 0.74%
1 Week
18.38%
decreased by 0.73%
1 Month
18.40%
decreased by 0.71%
Analysis last updated: Monday, April 20, 2026 at 11:01 PM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
| param | t-stat | |
|---|---|---|
| 1.3831 | 10.83 | |
| 0.0892 | 36.97 | |
| 0.9868 | 702.85 | |
| 10.8841 | 4.53 |
Estimation Period:
Jan 1, 1990 to Apr 17, 2026
Jan 1, 1990 to Apr 17, 2026
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