V-Lab
30Y US Treasury CMT 30 Year GJR-GARCH Volatility Analysis
Volatility prediction for Monday, July 27th, 2026
1 Day
10.71%
decreased by 0.15%
1 Week
10.76%
decreased by 0.10%
1 Month
10.98%
increased by 0.12%
Analysis last updated: Saturday, July 25, 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 Jul 24, 2026Model Insight
With persistence 0.999, volatility shocks have a half-life of 739 trading days (~2.9 years), close to a unit root, so long-run forecasts are highly sensitive to this estimate.
Leverage: Negative returns increase volatility 160% more than positive returns
σ
GJR-GARCH Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.0028 | 4.59*** |
α ARCH Response to squared shocks | 0.0203 | 16.93*** |
β GARCH Volatility persistence | 0.9625 | 1,022.89*** |
γ leverage Additional response to negative shocks | 0.0325 | 9.20*** |
Persistence:
0.999
Half-life:
739 days
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