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V-Lab

Straits Times Index STI GARCH Volatility Analysis

Volatility prediction for Friday, September 11th, 2026

1 Day

11.36%

increased by 0.19%

1 Week

11.73%

increased by 0.56%

1 Month

12.97%

increased by 1.80%

Analysis last updated: Thursday, September 10, 2026 at 10:11 AM UTC

Date Range:

from

to

6M ·

1Y ·

2Y ·

5Y ·

10Y ·

All

graph of Straits Times Index STI GARCH

News Impact Curve

How returns affect tomorrow's volatility

Volatility Forecast

How volatility evolves over time

Parameter Estimates

Jan 1, 1990 to Sep 4, 2026

Model Insight

Volatility shocks decay with a half-life of 43 trading days, meaning a shock loses half its impact after approximately 43 days.

σ

GARCH Model

Tap to view equation

Shock decay: Shocks decay with a 43-day half-life
ParamValuet-stat
ωconst0.0254
6.32***
αARCH0.1361
9.27***
βGARCH0.8480
64.62***

0.984

Persistence

43d

Half-life
σ

GARCH Model

Tap to view equation

ParameterValuet-statistic
ω

const

Unconditional variance weight

0.0254
6.32***
α

ARCH

Response to squared shocks

0.1361
9.27***
β

GARCH

Volatility persistence

0.8480
64.62***

Persistence:

0.984

Half-life:

43 days