V-Lab
ICE BofAML U.S. Bond Market 3 Month Option Volatility Estimate Index Zero Slope Spline-GARCH Volatility Analysis
Volatility prediction for Friday, September 4th, 2026
1 Day
35.71%
decreased by 0.34%
1 Week
35.82%
decreased by 0.23%
1 Month
36.09%
increased by 0.04%
Analysis last updated: Friday, September 4, 2026 at 11:28 PM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Apr 26, 1995 to Aug 27, 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 8 trading days.
τ
Zero Slope Spline-GARCH Model
Tap to view equation
Time-varying baseline: volatility reverts to a slowly-shifting spline trend
| Param | Value | t-stat |
|---|---|---|
| ωconst | 0.6281 | 4.58*** |
| αARCH | 0.0992 | 4.78*** |
| βGARCH | 0.8207 | 19.84*** |
Spline Coefficients
K=8
| γ1 | -0.0387 | -0.45 |
| γ2 | 0.0171 | 0.13 |
| γ3 | 0.0629 | 0.92 |
| γ4 | -0.0789 | -1.68* |
| γ5 | 0.0156 | 0.33 |
| γ6 | 0.1118 | 2.56** |
| γ7 | -0.1845 | -4.97*** |
| γ8 | 0.1331 | 4.99*** |
0.920
Persistence8d
Half-lifeτ
Zero Slope Spline-GARCH Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.6281 | 4.58*** |
α ARCH Response to squared shocks | 0.0992 | 4.78*** |
β GARCH Volatility persistence | 0.8207 | 19.84*** |
Spline Coefficients
K=8
| γ1 | -0.0387 | -0.45 |
| γ2 | 0.0171 | 0.13 |
| γ3 | 0.0629 | 0.92 |
| γ4 | -0.0789 | -1.68* |
| γ5 | 0.0156 | 0.33 |
| γ6 | 0.1118 | 2.56** |
| γ7 | -0.1845 | -4.97*** |
| γ8 | 0.1331 | 4.99*** |
Persistence:
0.920
Half-life:
8 days
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