V-Lab
iShares MSCI Hong Kong ETF Zero Slope Spline-GARCH Volatility Analysis
Volatility prediction for Wednesday, September 9th, 2026
1 Day
18.17%
increased by 0.30%
1 Week
18.59%
increased by 0.72%
1 Month
19.90%
increased by 2.03%
Analysis last updated: Tuesday, September 8, 2026 at 10:36 PM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Apr 1, 1996 to Sep 4, 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 21 trading days.
τ
Zero Slope Spline-GARCH Model
Tap to view equation
Time-varying baseline: volatility reverts to a slowly-shifting spline trend
| Param | Value | t-stat |
|---|---|---|
| ωconst | 0.7295 | 6.37*** |
| αARCH | 0.0935 | 7.79*** |
| βGARCH | 0.8743 | 56.15*** |
Spline Coefficients
K=6
| γ1 | -0.1210 | -5.93*** |
| γ2 | 0.1832 | 5.93*** |
| γ3 | -0.1075 | -3.70*** |
| γ4 | 0.0784 | 2.42** |
| γ5 | -0.0330 | -1.21 |
| γ6 | -0.0074 | -0.43 |
0.968
Persistence21d
Half-lifeτ
Zero Slope Spline-GARCH Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.7295 | 6.37*** |
α ARCH Response to squared shocks | 0.0935 | 7.79*** |
β GARCH Volatility persistence | 0.8743 | 56.15*** |
Spline Coefficients
K=6
| γ1 | -0.1210 | -5.93*** |
| γ2 | 0.1832 | 5.93*** |
| γ3 | -0.1075 | -3.70*** |
| γ4 | 0.0784 | 2.42** |
| γ5 | -0.0330 | -1.21 |
| γ6 | -0.0074 | -0.43 |
Persistence:
0.968
Half-life:
21 days
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