Optimal Blue 30-Year Fixed Rate Conforming Mortgage Index GJR-GARCH Volatility Analysis
Volatility prediction for Friday, October 23rd, 2026
1 Day
10.39%
increased by 0.19%
1 Week
10.55%
increased by 0.35%
1 Month
11.07%
increased by 0.87%
Analysis last updated: Friday, October 23, 2026 at 02:32 PM UTC
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News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Jan 3, 2017 to Oct 16, 2026Model Insight
Volatility shocks decay with a half-life of 30 trading days, meaning a shock loses half its impact after approximately 30 days.
σ
GJR-GARCH Model
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Shock decay: Shocks decay with a 30-day half-life
| Param | Value | t-stat |
|---|---|---|
| ωconst | 0.0165 | 3.07*** |
| αARCH | 0.0815 | 2.71*** |
| βGARCH | 0.8969 | 45.62*** |
| γleverage | -0.0025 | -0.05 |
0.977
Persistence30d
Half-lifeσ
GJR-GARCH Model
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| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.0165 | 3.07*** |
α ARCH Response to squared shocks | 0.0815 | 2.71*** |
β GARCH Volatility persistence | 0.8969 | 45.62*** |
γ leverage Additional response to negative shocks | -0.0025 | -0.05 |
Persistence:
0.977
Half-life:
30 days
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