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V-Lab

Vietnam Hanoi Stock Exchange Equity Index APARCH Volatility Analysis

Volatility prediction for Friday, July 17th, 2026

1 Day

35.63%

decreased by 2.87%

1 Week

35.37%

decreased by 3.13%

1 Month

34.50%

decreased by 4.00%

Analysis last updated: Friday, July 17, 2026 at 11:34 PM UTC

Date Range:

from

to

6M ·

1Y ·

2Y ·

5Y ·

10Y ·

All

graph of Vietnam Hanoi Stock Exchange Equity Index APARCH

News Impact Curve

How returns affect tomorrow's volatility

Volatility Forecast

How volatility evolves over time

Parameter Estimates

Jul 13, 2005 to Apr 29, 2026

Model Insight

This asset exhibits a notable leverage effect: negative returns increase next-day volatility 59% more than equivalent positive returns. The volatility power δ = 1.53 sits below 2, so large shocks influence volatility less than quadratically, a more outlier-robust response than standard GARCH.

σ

APARCH Model

Tap to view equation

ParameterValuet-statistic
ω

const

Unconditional variance weight

0.0589
27.99***
α

ARCH

Response to squared shocks

0.1802
36.96***
β

GARCH

Volatility persistence

0.8198
207.65***
γ

leverage

Additional response to negative shocks

0.1493
10.37***
δ

power

Transformation power

1.5315
24.26***

Persistence:

0.977

Half-life:

30 days