American Express Co Spline-GARCH Volatility Analysis
Volatility prediction for Monday, April 27th, 2026
1 Day
32.84%
decreased by 0.54%
1 Week
33.23%
decreased by 0.15%
1 Month
34.66%
increased by 1.28%
Analysis last updated: Friday, April 24, 2026 at 10:15 PM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
| param | t-stat | |
|---|---|---|
| 1.4717 | 7.70 | |
| 0.0798 | 10.58 | |
| 0.9085 | 119.40 | |
| 0.0026 | 3.86 |
Estimation Period:
Jan 2, 1990 to Apr 24, 2026
Jan 2, 1990 to Apr 24, 2026
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