V-Lab
1Y US Treasury 1 Year Zero Coupon Yield Continuously Compounded 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, July 20th, 2026
1 Day
17.80%
decreased by 0.55%
1 Week
18.07%
decreased by 0.28%
1 Month
19.12%
increased by 0.77%
Analysis last updated: Wednesday, July 22, 2026 at 06:18 AM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Jan 2, 1990 to Jul 17, 2026Model Insight
With persistence 1.000, volatility shocks have a half-life of 15753 trading days (~62.5 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
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 1.1677 | 2.75*** |
α ARCH Response to squared shocks | 0.0863 | 2.03** |
β GARCH Volatility persistence | 0.9137 | 21.51*** |
Spline Coefficients
K=8
| γ1 | -0.2846 | -1.76* |
| γ2 | 0.3617 | 1.61 |
| γ3 | -0.1079 | -0.99 |
| γ4 | 0.1816 | 2.45** |
| γ5 | -0.3215 | -3.30*** |
| γ6 | 0.1368 | 0.99 |
| γ7 | 0.1452 | 1.17 |
| γ8 | -0.1456 | -2.20** |
Persistence:
1.000
Half-life:
15753 days
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