3M US Treasury CMT 3 Month Zero Slope Spline-GARCH Volatility Analysis
High-persistence model: shocks decay very slowly, so the theoretical long-run value may not be practically meaningful
Volatility prediction for Monday, November 9th, 2026
1 Day
8.80%
1 Week
8.98%
1 Month
9.65%
Analysis last updated: Saturday, November 7, 2026 at 05:00 AM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Jan 2, 1990 to Nov 6, 2026Model Insight
With persistence 1.000, volatility shocks have a half-life of 14440 trading days (~57.3 years), close to a unit root, so long-run forecasts are highly sensitive to this estimate.
Zero Slope Spline-GARCH Model
Tap to view equation
| Param | Value | t-stat |
|---|---|---|
| ωconst | 1.1332 | 3.44*** |
| αARCH | 0.1768 | 1.72* |
| βGARCH | 0.8232 | 8.01*** |
| γ1 | -0.1787 | -4.37*** |
| γ2 | 0.3160 | 4.80*** |
| γ3 | -0.2953 | -5.88*** |
| γ4 | 0.4270 | 9.08*** |
| γ5 | -0.5921 | -14.95*** |
| γ6 | 0.4481 | 14.23*** |
| γ7 | -0.1080 | -4.56*** |
1.000
Persistence14440d
Half-lifeZero Slope Spline-GARCH Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 1.1332 | 3.44*** |
α ARCH Response to squared shocks | 0.1768 | 1.72* |
β GARCH Volatility persistence | 0.8232 | 8.01*** |
| γ1 | -0.1787 | -4.37*** |
| γ2 | 0.3160 | 4.80*** |
| γ3 | -0.2953 | -5.88*** |
| γ4 | 0.4270 | 9.08*** |
| γ5 | -0.5921 | -14.95*** |
| γ6 | 0.4481 | 14.23*** |
| γ7 | -0.1080 | -4.56*** |
Persistence:
1.000
Half-life:
14440 days
Other 3M US Treasury CMT 3 Month Analyses
Other Zero Slope Spline-GARCH Analyses on Government Bonds