V-Lab
iShares 10-20 Year Treasury Bond ETF Spline-GARCH Volatility Analysis
Volatility prediction for Wednesday, October 7th, 2026
1 Day
8.56%
decreased by 0.23%
1 Week
8.53%
decreased by 0.26%
1 Month
8.44%
decreased by 0.35%
Analysis last updated: Tuesday, October 6, 2026 at 09:53 PM UTC
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News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Jan 11, 2007 to Oct 2, 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 24 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 | 0.7748 | 8.23*** |
| αARCH | 0.0592 | 6.45*** |
| βGARCH | 0.9120 | 70.82*** |
Spline Coefficients
K=3
| γ1 | -0.0452 | -4.46*** |
| γ2 | 0.0946 | 5.43*** |
| γ3 | -0.1126 | -5.69*** |
0.971
Persistence24d
Half-lifeτ
Spline-GARCH Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.7748 | 8.23*** |
α ARCH Response to squared shocks | 0.0592 | 6.45*** |
β GARCH Volatility persistence | 0.9120 | 70.82*** |
Spline Coefficients
K=3
| γ1 | -0.0452 | -4.46*** |
| γ2 | 0.0946 | 5.43*** |
| γ3 | -0.1126 | -5.69*** |
Persistence:
0.971
Half-life:
24 days
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