AT&T Inc Zero Slope Spline-GARCH Volatility Analysis
Volatility prediction for Wednesday, May 13th, 2026
1 Day
23.89%
increased by 0.12%
1 Week
24.24%
increased by 0.47%
1 Month
25.26%
increased by 1.49%
Analysis last updated: Tuesday, May 12, 2026 at 09:52 PM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
| param | t-stat | |
|---|---|---|
| 0.9269 | 7.53 | |
| 0.0739 | 8.89 | |
| 0.8788 | 65.89 | |
| 0.0285 | 1.24 | |
| -0.0079 | -0.23 | |
| -0.1020 | -4.17 | |
| 0.1461 | 6.66 | |
| -0.0957 | -4.81 | |
| 0.0735 | 3.14 | |
| -0.0677 | -2.59 | |
| 0.0243 | 1.13 |
Estimation Period:
Jan 2, 1990 to May 8, 2026
Jan 2, 1990 to May 8, 2026
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