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V-Lab

Budapest Stock Exchange Budapest Stock Index APARCH Volatility Analysis

Volatility prediction for Friday, September 4th, 2026

1 Day

16.61%

decreased by 0.05%

1 Week

17.26%

increased by 0.60%

1 Month

19.26%

increased by 2.60%

Analysis last updated: Friday, September 4, 2026 at 05:39 PM UTC

Date Range:

from

to

6M ·

1Y ·

2Y ·

5Y ·

10Y ·

All

graph of Budapest Stock Exchange Budapest Stock Index APARCH

News Impact Curve

How returns affect tomorrow's volatility

Volatility Forecast

How volatility evolves over time

Parameter Estimates

Jan 1, 1991 to Aug 28, 2026

Model Insight

This asset exhibits a notable leverage effect: negative returns increase next-day volatility 78% more than equivalent positive returns.

σ

APARCH Model

Tap to view equation

ParameterValuet-statistic
ω

const

Unconditional variance weight

0.0775
4.43***
α

ARCH

Response to squared shocks

0.1454
8.09***
β

GARCH

Volatility persistence

0.8195
33.98***
γ

leverage

Additional response to negative shocks

0.1386
3.25***
δ

power

Transformation power

2.0699
7.49***

Persistence:

0.972

Half-life:

24 days