Bloomberg EM USD Aggregate Bond Index Total Return Value Unhedged USD Zero Slope Spline-GARCH Volatility Analysis
Volatility prediction for Friday, July 17th, 2026
1 Day
3.08%
decreased by 0.10%
1 Week
3.52%
increased by 0.34%
1 Month
4.49%
increased by 1.31%
Analysis last updated: Friday, July 17, 2026 at 11:36 PM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Jan 1, 1997 to Apr 4, 2025Model Insight
This model fits a time-varying baseline (a spline), so volatility mean-reverts toward a slowly-shifting long-run level rather than a constant. Short-run deviations decay with a half-life of 11 trading days.
τ
Zero Slope Spline-GARCH Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 1.5762 | 4.86*** |
α ARCH Response to squared shocks | 0.2292 | 10.75*** |
β GARCH Volatility persistence | 0.7088 | 28.97*** |
Spline Coefficients
K=10
| γ1 | -0.2112 | -2.08** |
| γ2 | 0.3718 | 2.24** |
| γ3 | -0.3641 | -3.22*** |
| γ4 | 0.4552 | 5.11*** |
| γ5 | -0.4606 | -4.98*** |
| γ6 | 0.3761 | 4.13*** |
| γ7 | -0.2680 | -3.24*** |
| γ8 | 0.1585 | 2.21** |
| γ9 | -0.0345 | -0.54 |
| γ10 | -0.0653 | -1.41 |
Persistence:
0.938
Half-life:
11 days
Other Bloomberg EM USD Aggregate Bond Index Total Return Value Unhedged USD Analyses
Other Zero Slope Spline-GARCH Analyses on Bond Indices