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V-Lab

Stock Exchange of Thailand SET Index GJR-GARCH Volatility Analysis

Volatility prediction for Friday, July 24th, 2026

1 Day

13.72%

decreased by 0.61%

1 Week

14.12%

decreased by 0.21%

1 Month

15.57%

increased by 1.24%

Analysis last updated: Friday, July 24, 2026 at 05:41 PM UTC

Date Range:

from

to

6M ·

1Y ·

2Y ·

5Y ·

10Y ·

All

graph of Stock Exchange of Thailand SET Index GJR-GARCH

News Impact Curve

How returns affect tomorrow's volatility

Volatility Forecast

How volatility evolves over time

Parameter Estimates

Jan 2, 1990 to Jul 17, 2026

Model Insight

With persistence 0.994, volatility shocks have a half-life of 107 trading days (~0.4 years), close to a unit root, so long-run forecasts are highly sensitive to this estimate.

Leverage: Negative returns increase volatility 103% more than positive returns

σ

GJR-GARCH Model

Tap to view equation

ParameterValuet-statistic
ω

const

Unconditional variance weight

0.0272
16.86***
α

ARCH

Response to squared shocks

0.0735
13.59***
β

GARCH

Volatility persistence

0.8824
366.88***
γ

leverage

Additional response to negative shocks

0.0754
4.74***

Persistence:

0.994

Half-life:

107 days