30Y US Treasury CMT 30 Year GJR-GARCH Volatility Analysis
Volatility prediction for Monday, November 9th, 2026
1 Day
14.73%
decreased by 0.25%
1 Week
14.77%
decreased by 0.21%
1 Month
14.90%
decreased by 0.08%
Analysis last updated: Saturday, November 7, 2026 at 04:00 AM UTC
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News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Jan 1, 1990 to Nov 6, 2026Model Insight
With persistence 0.999, volatility shocks have a half-life of 679 trading days (~2.7 years), close to a unit root, so long-run forecasts are highly sensitive to this estimate.
Leverage: Negative returns increase volatility 157% more than positive returns
σ
GJR-GARCH Model
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High persistence: persistence 0.999, shock half-life ~679 daysLeverage: Negative returns increase volatility 157% more than positive returns
| Param | Value | t-stat |
|---|---|---|
| ωconst | 0.0029 | 1.23 |
| αARCH | 0.0204 | 4.25*** |
| βGARCH | 0.9625 | 256.94*** |
| γleverage | 0.0321 | 2.27** |
0.999
Persistence679d
Half-lifeσ
GJR-GARCH Model
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| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.0029 | 1.23 |
α ARCH Response to squared shocks | 0.0204 | 4.25*** |
β GARCH Volatility persistence | 0.9625 | 256.94*** |
γ leverage Additional response to negative shocks | 0.0321 | 2.27** |
Persistence:
0.999
Half-life:
679 days
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