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V-Lab

Heungkuk Fire & Marine Insurance Co Ltd APARCH Volatility Analysis

Volatility prediction for Monday, August 10th, 2026

1 Day

43.87%

decreased by 2.02%

1 Week

44.34%

decreased by 1.55%

1 Month

46.11%

increased by 0.22%

Analysis last updated: Saturday, August 8, 2026 at 11:40 PM UTC

Date Range:

from

to

6M ·

1Y ·

2Y ·

5Y ·

10Y ·

All

graph of Heungkuk Fire & Marine Insurance Co Ltd APARCH

News Impact Curve

How returns affect tomorrow's volatility

Volatility Forecast

How volatility evolves over time

Parameter Estimates

Jan 3, 1990 to Aug 7, 2026

Model Insight

With persistence 0.995, volatility shocks have a half-life of 137 trading days (~0.5 years), close to a unit root, so long-run forecasts are highly sensitive to this estimate.

Inverse leverage: Positive returns increase volatility 13% more than negative returns

σ

APARCH Model

Tap to view equation

ParameterValuet-statistic
ω

const

Unconditional variance weight

0.1035
18.21***
α

ARCH

Response to squared shocks

0.1301
37.39***
β

GARCH

Volatility persistence

0.8699
260.13***
γ

leverage

Additional response to negative shocks

-0.0330
-2.47**
δ

power

Transformation power

1.8845
38.61***

Persistence:

0.995

Half-life:

137 days