V-Lab
1M US Treasury CMT 1 Month Zero Slope Spline-GARCH Volatility Analysis
Volatility prediction for Thursday, September 24th, 2026
1 Day
11.04%
decreased by 0.28%
1 Week
11.31%
decreased by 0.01%
1 Month
12.32%
increased by 1.00%
Analysis last updated: Thursday, September 24, 2026 at 03:00 AM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Jul 31, 2001 to Sep 18, 2026Model Insight
With persistence 0.999, volatility shocks have a half-life of 536 trading days (~2.1 years), close to a unit root, so long-run forecasts are highly sensitive to this estimate.
τ
Zero Slope Spline-GARCH Model
Tap to view equation
High persistence: persistence 0.999, shock half-life ~536 days
| Param | Value | t-stat |
|---|---|---|
| ωconst | 2.0074 | 1.45 |
| αARCH | 0.1457 | 8.99*** |
| βGARCH | 0.8530 | 54.41*** |
Spline Coefficients
K=9
| γ1 | 0.4690 | 0.58 |
| γ2 | 0.7842 | 0.65 |
| γ3 | -2.3564 | -2.64*** |
| γ4 | 1.4501 | 2.35** |
| γ5 | -0.7158 | -2.11** |
| γ6 | 0.2221 | 0.86 |
| γ7 | 0.3597 | 1.68* |
| γ8 | 0.0429 | 0.18 |
| γ9 | -0.3870 | -1.69* |
0.999
Persistence536d
Half-lifeτ
Zero Slope Spline-GARCH Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 2.0074 | 1.45 |
α ARCH Response to squared shocks | 0.1457 | 8.99*** |
β GARCH Volatility persistence | 0.8530 | 54.41*** |
Spline Coefficients
K=9
| γ1 | 0.4690 | 0.58 |
| γ2 | 0.7842 | 0.65 |
| γ3 | -2.3564 | -2.64*** |
| γ4 | 1.4501 | 2.35** |
| γ5 | -0.7158 | -2.11** |
| γ6 | 0.2221 | 0.86 |
| γ7 | 0.3597 | 1.68* |
| γ8 | 0.0429 | 0.18 |
| γ9 | -0.3870 | -1.69* |
Persistence:
0.999
Half-life:
536 days
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