20Y US Treasury CMT 20 Year GJR-GARCH Volatility Analysis
Volatility prediction for Monday, November 9th, 2026
1 Day
15.99%
decreased by 0.25%
1 Week
16.04%
decreased by 0.20%
1 Month
16.20%
decreased by 0.04%
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
Oct 1, 1993 to Nov 6, 2026Model Insight
With persistence 0.999, volatility shocks have a half-life of 825 trading days (~3.3 years), close to a unit root, so long-run forecasts are highly sensitive to this estimate.
Leverage: Negative returns increase volatility 158% more than positive returns
σ
GJR-GARCH Model
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High persistence: persistence 0.999, shock half-life ~825 daysLeverage: Negative returns increase volatility 158% more than positive returns
| Param | Value | t-stat |
|---|---|---|
| ωconst | 0.0035 | 1.15 |
| αARCH | 0.0199 | 4.52*** |
| βGARCH | 0.9635 | 218.93*** |
| γleverage | 0.0314 | 2.45** |
0.999
Persistence825d
Half-lifeσ
GJR-GARCH Model
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| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.0035 | 1.15 |
α ARCH Response to squared shocks | 0.0199 | 4.52*** |
β GARCH Volatility persistence | 0.9635 | 218.93*** |
γ leverage Additional response to negative shocks | 0.0314 | 2.45** |
Persistence:
0.999
Half-life:
825 days
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