V-Lab
Chegg Inc Zero Slope Spline-GARCH Volatility Analysis
Volatility prediction for Monday, July 27th, 2026
1 Day
92.91%
decreased by 35.54%
1 Week
112.72%
decreased by 15.73%
1 Month
123.47%
decreased by 4.98%
Analysis last updated: Friday, July 24, 2026 at 10:25 PM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Nov 13, 2013 to Jul 24, 2026Model Insight
This model fits a time-varying baseline (a spline), so volatility mean-reverts toward a slowly-shifting long-run level rather than a constant. Short-run deviations decay with a half-life of 1 trading day.
τ
Zero Slope Spline-GARCH Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.9709 | 5.59*** |
α ARCH Response to squared shocks | 0.4770 | 3.17*** |
β GARCH Volatility persistence | 0.1171 | 1.41 |
Spline Coefficients
K=3
| γ1 | 0.0225 | 0.45 |
| γ2 | 0.0128 | 0.18 |
| γ3 | -0.0729 | -2.39** |
Persistence:
0.594
Half-life:
1 days
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