V-Lab
S&P MERVAL Argentina Total Return Index ARS Spline-GARCH Volatility Analysis
Volatility prediction for Wednesday, September 9th, 2026
1 Day
31.83%
decreased by 0.01%
1 Week
34.08%
increased by 2.24%
1 Month
40.82%
increased by 8.98%
Analysis last updated: Tuesday, September 8, 2026 at 11:46 PM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Jan 5, 1990 to Sep 8, 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 27 trading days.
τ
Spline-GARCH Model
Tap to view equation
Time-varying baseline: volatility reverts to a slowly-shifting spline trend
| Param | Value | t-stat |
|---|---|---|
| ωconst | 1.2307 | 7.55*** |
| αARCH | 0.1209 | 7.19*** |
| βGARCH | 0.8537 | 50.79*** |
Spline Coefficients
K=1
| γ1 | 0.0024 | 3.18*** |
0.975
Persistence27d
Half-lifeτ
Spline-GARCH Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 1.2307 | 7.55*** |
α ARCH Response to squared shocks | 0.1209 | 7.19*** |
β GARCH Volatility persistence | 0.8537 | 50.79*** |
Spline Coefficients
K=1
| γ1 | 0.0024 | 3.18*** |
Persistence:
0.975
Half-life:
27 days
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