V-Lab
1Y US Treasury CMT 1 Year Zero Slope Spline-GARCH Volatility Analysis
Volatility prediction for Thursday, September 24th, 2026
1 Day
18.38%
increased by 0.48%
1 Week
18.66%
increased by 0.76%
1 Month
19.72%
increased by 1.82%
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
Jan 1, 1990 to Sep 18, 2026Model Insight
With persistence 1.000, volatility shocks have a half-life of 1654 trading days (~6.6 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 1.000, shock half-life ~1654 days
| Param | Value | t-stat |
|---|---|---|
| ωconst | 1.2281 | 2.23** |
| αARCH | 0.0921 | 9.15*** |
| βGARCH | 0.9075 | 89.88*** |
Spline Coefficients
K=6
| γ1 | -0.0621 | -1.73* |
| γ2 | 0.0610 | 1.12 |
| γ3 | 0.1162 | 3.07*** |
| γ4 | -0.2635 | -7.68*** |
| γ5 | 0.2088 | 6.72*** |
| γ6 | -0.0627 | -2.58*** |
1.000
Persistence1654d
Half-lifeτ
Zero Slope Spline-GARCH Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 1.2281 | 2.23** |
α ARCH Response to squared shocks | 0.0921 | 9.15*** |
β GARCH Volatility persistence | 0.9075 | 89.88*** |
Spline Coefficients
K=6
| γ1 | -0.0621 | -1.73* |
| γ2 | 0.0610 | 1.12 |
| γ3 | 0.1162 | 3.07*** |
| γ4 | -0.2635 | -7.68*** |
| γ5 | 0.2088 | 6.72*** |
| γ6 | -0.0627 | -2.58*** |
Persistence:
1.000
Half-life:
1654 days
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