30Y US Treasury CMT 30 Year Zero Slope Spline-GARCH Volatility Analysis
Volatility prediction for Monday, November 9th, 2026
1 Day
15.37%
decreased by 0.28%
1 Week
15.49%
decreased by 0.16%
1 Month
15.94%
increased by 0.29%
Analysis last updated: Saturday, November 7, 2026 at 05:01 AM UTC
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News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Jan 1, 1990 to Nov 6, 2026Model Insight
With persistence 0.995, volatility shocks have a half-life of 148 trading days (~0.6 years), close to a unit root, so long-run forecasts are highly sensitive to this estimate.
τ
Zero Slope Spline-GARCH Model
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High persistence: persistence 0.995, shock half-life ~148 days
| Param | Value | t-stat |
|---|---|---|
| ωconst | 0.6601 | 6.67*** |
| αARCH | 0.0447 | 8.35*** |
| βGARCH | 0.9506 | 173.76*** |
Spline Coefficients
K=1
| γ1 | -0.0006 | -3.19*** |
0.995
Persistence148d
Half-lifeτ
Zero Slope Spline-GARCH Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.6601 | 6.67*** |
α ARCH Response to squared shocks | 0.0447 | 8.35*** |
β GARCH Volatility persistence | 0.9506 | 173.76*** |
Spline Coefficients
K=1
| γ1 | -0.0006 | -3.19*** |
Persistence:
0.995
Half-life:
148 days
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