Graham Holdings Co Zero Slope Spline-GARCH Volatility Analysis
Volatility Prediction for Monday, February 23rd, 2026:28.74% (-0.45%)
Parameter Estimates
| param | t-stat | |
|---|---|---|
| 0.8998 | 6.10 | |
| 0.0728 | 8.42 | |
| 0.8991 | 77.80 | |
| 0.0689 | 4.44 | |
| -0.1092 | -4.65 | |
| 0.0730 | 3.99 | |
| -0.0704 | -3.70 | |
| 0.0669 | 3.46 | |
| -0.0408 | -2.81 |
Estimation Period:
Jan 1, 1990 to Feb 20, 2026
Jan 1, 1990 to Feb 20, 2026
News Impact Curve
Volatility Forecasts
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