Skip to main content
V-Lab

Iwatsuka Confectionery Co GJR-GARCH Volatility Analysis

Volatility prediction for Monday, August 24th, 2026

1 Day

12.00%

decreased by 0.23%

1 Week

12.71%

increased by 0.48%

1 Month

15.12%

increased by 2.89%

Analysis last updated: Saturday, August 22, 2026 at 11:36 PM UTC

Date Range:

from

to

6M ·

1Y ·

2Y ·

5Y ·

10Y ·

All

graph of Iwatsuka Confectionery Co GJR-GARCH

News Impact Curve

How returns affect tomorrow's volatility

Volatility Forecast

How volatility evolves over time

Parameter Estimates

Jan 24, 1995 to Aug 21, 2026

Model Insight

With persistence 0.995, volatility shocks have a half-life of 132 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 60% more than negative returns

σ

GJR-GARCH Model

Tap to view equation

ParameterValuet-statistic
ω

const

Unconditional variance weight

0.0377
11.46***
α

ARCH

Response to squared shocks

0.1249
17.66***
β

GARCH

Volatility persistence

0.8932
291.04***
γ

leverage

Additional response to negative shocks

-0.0467
-4.34***

Persistence:

0.995

Half-life:

132 days