S&P MERVAL Argentina Total Return Index ARS EGARCH Volatility Analysis
Volatility prediction for Monday, October 19th, 2026
1 Day
27.55%
decreased by 1.26%
1 Week
28.32%
decreased by 0.49%
1 Month
31.09%
increased by 2.28%
Analysis last updated: Friday, October 16, 2026 at 09:25 PM UTC
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News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Jan 5, 1990 to Oct 16, 2026Model Insight
Volatility shocks decay with a half-life of 23 trading days, meaning a shock loses half its impact after approximately 23 days.
σ
EGARCH Model
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Shock decay: Shocks decay with a 23-day half-life
| Param | Value | t-stat |
|---|---|---|
| ωconst | 0.0612 | 5.45*** |
| αARCH | 0.2442 | 7.26*** |
| βGARCH | 0.9699 | 160.82*** |
| γleverage | -0.0316 | -1.15 |
0.970
Persistence23d
Half-lifeσ
EGARCH Model
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| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.0612 | 5.45*** |
α ARCH Response to squared shocks | 0.2442 | 7.26*** |
β GARCH Volatility persistence | 0.9699 | 160.82*** |
γ leverage Additional response to negative shocks | -0.0316 | -1.15 |
Persistence:
0.970
Half-life:
23 days
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