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V-Lab

Straits Times Index STI GJR-GARCH Volatility Analysis

Volatility prediction for Thursday, July 16th, 2026

1 Day

12.84%

increased by 1.49%

1 Week

13.12%

increased by 1.77%

1 Month

14.09%

increased by 2.74%

Analysis last updated: Wednesday, July 15, 2026 at 10:03 AM UTC

Date Range:

from

to

6M ·

1Y ·

2Y ·

5Y ·

10Y ·

All

graph of Straits Times Index STI GJR-GARCH

News Impact Curve

How returns affect tomorrow's volatility

Volatility Forecast

How volatility evolves over time

Parameter Estimates

Jan 1, 1990 to Jul 10, 2026

Model Insight

This asset exhibits a strong leverage effect: negative returns increase next-day volatility 153% more than equivalent positive returns.

σ

GJR-GARCH Model

Tap to view equation

ParameterValuet-statistic
ω

const

Unconditional variance weight

0.0254
27.12***
α

ARCH

Response to squared shocks

0.0726
22.60***
β

GARCH

Volatility persistence

0.8558
300.90***
γ

leverage

Additional response to negative shocks

0.1111
15.12***

Persistence:

0.984

Half-life:

43 days