Skip to main content
V-Lab
V-Lab

S&P MERVAL Argentina Total Return Index ARS APARCH Volatility Analysis

Volatility prediction for Monday, October 19th, 2026

1 Day

26.40%

decreased by 1.04%

1 Week

27.18%

decreased by 0.26%

1 Month

29.85%

increased by 2.41%

Analysis last updated: Friday, October 16, 2026 at 09:26 PM UTC

Press Delete or Backspace to remove this series.
Date Range:

from

10/16/2024

to

10/16/2026

6M ·

1Y ·

2Y ·

5Y ·

10Y ·

All

graph of S&P MERVAL Argentina Total Return Index ARS APARCH

News Impact Curve

How returns affect tomorrow's volatility

Volatility Forecast

How volatility evolves over time

Parameter Estimates

Jan 5, 1990 to Oct 16, 2026

Model Insight

Volatility shocks decay with a half-life of 55 trading days, meaning a shock loses half its impact after approximately 55 days. The volatility power δ = 2.19 sits above 2, so large shocks influence volatility more than quadratically, dominating the response more than in standard GARCH.

σ

APARCH Model

Tap to view equation

Shock decay: Shocks decay with a 55-day half-lifeδ = 2.19 · super-quadratic power
ParamValuet-stat
ωconst0.1400
2.52**
αARCH0.1116
6.94***
βGARCH0.8661
40.05***
γleverage0.0948
1.56
δpower2.1881
5.37***

0.987

Persistence

55d

Half-life
σ

APARCH Model

Tap to view equation

ParameterValuet-statistic
ω

const

Unconditional variance weight

0.1400
2.52**
α

ARCH

Response to squared shocks

0.1116
6.94***
β

GARCH

Volatility persistence

0.8661
40.05***
γ

leverage

Additional response to negative shocks

0.0948
1.56
δ

power

Transformation power

2.1881
5.37***

Persistence:

0.987

Half-life:

55 days