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
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Jan 1, 1991 to Aug 28, 2026Model 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
| Parameter | Value | t-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
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