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V-Lab

Vietnam Ho Chi Minh Stock Index / VN-Index GJR-GARCH Volatility Analysis

Volatility prediction for Friday, August 21st, 2026

1 Day

17.52%

decreased by 0.92%

1 Week

17.73%

decreased by 0.71%

1 Month

18.41%

decreased by 0.03%

Analysis last updated: Friday, August 21, 2026 at 08:13 PM UTC

Date Range:

from

to

6M ·

1Y ·

2Y ·

5Y ·

10Y ·

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graph of Vietnam Ho Chi Minh Stock Index / VN-Index GJR-GARCH

News Impact Curve

How returns affect tomorrow's volatility

Volatility Forecast

How volatility evolves over time

Parameter Estimates

Aug 12, 2010 to Apr 29, 2026

Model Insight

This asset exhibits a strong leverage effect: negative returns increase next-day volatility 103% more than equivalent positive returns.

σ

GJR-GARCH Model

Tap to view equation

ParameterValuet-statistic
ω

const

Unconditional variance weight

0.0466
13.97***
α

ARCH

Response to squared shocks

0.0768
9.43***
β

GARCH

Volatility persistence

0.8576
186.67***
γ

leverage

Additional response to negative shocks

0.0790
5.67***

Persistence:

0.974

Half-life:

26 days