20Y US Treasury 20 Year Zero Coupon Yield Continuously Compounded GJR-GARCH Volatility Analysis
Volatility prediction for Monday, November 2nd, 2026
1 Day
15.86%
decreased by 0.29%
1 Week
15.89%
decreased by 0.26%
1 Month
16.01%
decreased by 0.14%
Analysis last updated: Wednesday, November 4, 2026 at 04:05 AM UTC
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News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Jan 2, 1990 to Oct 30, 2026Model Insight
With persistence 0.999, volatility shocks have a half-life of 869 trading days (~3.4 years), close to a unit root, so long-run forecasts are highly sensitive to this estimate.
Leverage: Negative returns increase volatility 123% more than positive returns
σ
GJR-GARCH Model
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High persistence: persistence 0.999, shock half-life ~869 daysLeverage: Negative returns increase volatility 123% more than positive returns
| Param | Value | t-stat |
|---|---|---|
| ωconst | 0.0027 | 1.43 |
| αARCH | 0.0231 | 5.18*** |
| βGARCH | 0.9619 | 234.83*** |
| γleverage | 0.0285 | 2.41** |
0.999
Persistence869d
Half-lifeσ
GJR-GARCH Model
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| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.0027 | 1.43 |
α ARCH Response to squared shocks | 0.0231 | 5.18*** |
β GARCH Volatility persistence | 0.9619 | 234.83*** |
γ leverage Additional response to negative shocks | 0.0285 | 2.41** |
Persistence:
0.999
Half-life:
869 days
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