V-Lab
State Street SPDR Bloomberg 1-10 Year TIPS ETF Spline-GARCH Volatility Analysis
Volatility prediction for Monday, August 10th, 2026
1 Day
2.28%
decreased by 0.01%
1 Week
2.33%
increased by 0.04%
1 Month
2.43%
increased by 0.14%
Analysis last updated: Friday, August 7, 2026 at 10:44 PM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
May 30, 2013 to Aug 7, 2026Model 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 6 trading days.
τ
Spline-GARCH Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 1.5832 | 2.67*** |
α ARCH Response to squared shocks | 0.0714 | 2.63*** |
β GARCH Volatility persistence | 0.8159 | 14.50*** |
Spline Coefficients
K=9
| γ1 | 0.1968 | 0.47 |
| γ2 | -0.1951 | -0.37 |
| γ3 | -0.3571 | -1.03 |
| γ4 | 0.9031 | 2.20** |
| γ5 | -0.8412 | -2.15** |
| γ6 | 0.8854 | 2.43** |
| γ7 | -1.5049 | -4.49*** |
| γ8 | 1.3688 | 4.23*** |
| γ9 | -0.6814 | -1.27 |
Persistence:
0.887
Half-life:
6 days
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