Skip to main content
V-Lab
V-Lab

Taiwan Stock Exchange Weighted Index GARCH Volatility Analysis

Volatility prediction for Tuesday, September 22nd, 2026

1 Day

21.32%

decreased by 0.22%

1 Week

21.41%

decreased by 0.13%

1 Month

21.76%

increased by 0.22%

Analysis last updated: Monday, September 21, 2026 at 07:03 AM UTC

Date Range:

from

to

6M ·

1Y ·

2Y ·

5Y ·

10Y ·

All

graph of Taiwan Stock Exchange Weighted Index GARCH

News Impact Curve

How returns affect tomorrow's volatility

Volatility Forecast

How volatility evolves over time

Parameter Estimates

Jan 1, 1990 to Sep 18, 2026

Model Insight

With persistence 0.995, volatility shocks have a half-life of 128 trading days (~0.5 years), close to a unit root, so long-run forecasts are highly sensitive to this estimate.

σ

GARCH Model

Tap to view equation

High persistence: persistence 0.995, shock half-life ~128 days
ParamValuet-stat
ωconst0.0174
4.38***
αARCH0.0789
9.91***
βGARCH0.9157
117.96***

0.995

Persistence

128d

Half-life
σ

GARCH Model

Tap to view equation

ParameterValuet-statistic
ω

const

Unconditional variance weight

0.0174
4.38***
α

ARCH

Response to squared shocks

0.0789
9.91***
β

GARCH

Volatility persistence

0.9157
117.96***

Persistence:

0.995

Half-life:

128 days