V-Lab
3Y US Treasury CMT 3 Year Zero Slope Spline-GARCH Volatility Analysis
Volatility prediction for Thursday, September 24th, 2026
1 Day
23.16%
increased by 2.91%
1 Week
23.31%
increased by 3.06%
1 Month
23.88%
increased by 3.63%
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 2265 trading days (~9.0 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 ~2265 days
| Param | Value | t-stat |
|---|---|---|
| ωconst | 1.1896 | 3.30*** |
| αARCH | 0.0537 | 8.97*** |
| βGARCH | 0.9460 | 156.82*** |
Spline Coefficients
K=1
| γ1 | -0.0006 | -1.47 |
1.000
Persistence2265d
Half-lifeτ
Zero Slope Spline-GARCH Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 1.1896 | 3.30*** |
α ARCH Response to squared shocks | 0.0537 | 8.97*** |
β GARCH Volatility persistence | 0.9460 | 156.82*** |
Spline Coefficients
K=1
| γ1 | -0.0006 | -1.47 |
Persistence:
1.000
Half-life:
2265 days
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