ICE BofAML U.S. Bond Market 3 Month Option Volatility Estimate Index Spline-GARCH Volatility Analysis
Volatility prediction for Friday, October 16th, 2026
1 Day
48.77%
decreased by 0.96%
1 Week
49.80%
increased by 0.07%
1 Month
52.16%
increased by 2.43%
Analysis last updated: Friday, October 16, 2026 at 11:49 PM UTC
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News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Apr 26, 1995 to Oct 8, 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
Spline-GARCH Model
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Time-varying baseline: volatility reverts to a slowly-shifting spline trend
| Param | Value | t-stat |
|---|---|---|
| ωconst | 0.6118 | 4.64*** |
| αARCH | 0.0989 | 4.62*** |
| βGARCH | 0.8161 | 18.48*** |
Spline Coefficients
K=8
| γ1 | -0.0429 | -0.52 |
| γ2 | 0.0226 | 0.18 |
| γ3 | 0.0618 | 0.93 |
| γ4 | -0.0804 | -1.77* |
| γ5 | 0.0172 | 0.37 |
| γ6 | 0.1174 | 2.68*** |
| γ7 | -0.2143 | -5.11*** |
| γ8 | 0.2481 | 3.57*** |
0.915
Persistence8d
Half-lifeτ
Spline-GARCH Model
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| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.6118 | 4.64*** |
α ARCH Response to squared shocks | 0.0989 | 4.62*** |
β GARCH Volatility persistence | 0.8161 | 18.48*** |
Spline Coefficients
K=8
| γ1 | -0.0429 | -0.52 |
| γ2 | 0.0226 | 0.18 |
| γ3 | 0.0618 | 0.93 |
| γ4 | -0.0804 | -1.77* |
| γ5 | 0.0172 | 0.37 |
| γ6 | 0.1174 | 2.68*** |
| γ7 | -0.2143 | -5.11*** |
| γ8 | 0.2481 | 3.57*** |
Persistence:
0.915
Half-life:
8 days
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