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V-Lab

Taiwan Stock Exchange Weighted Index AGARCH Volatility Analysis

Volatility prediction for Tuesday, August 25th, 2026

1 Day

27.37%

decreased by 0.88%

1 Week

27.35%

decreased by 0.90%

1 Month

27.25%

decreased by 1.00%

Analysis last updated: Monday, August 24, 2026 at 07:04 AM UTC

Date Range:

from

to

6M ·

1Y ·

2Y ·

5Y ·

10Y ·

All

graph of Taiwan Stock Exchange Weighted Index AGARCH

News Impact Curve

How returns affect tomorrow's volatility

Volatility Forecast

How volatility evolves over time

Parameter Estimates

Jan 1, 1990 to Aug 21, 2026

Model Insight

The news-impact curve is shifted (γ = 0.56) so that negative returns raise next-day volatility more than positive returns of the same size. The gap is largest for small shocks and narrows for larger ones.

σ

AGARCH Model

Tap to view equation

ParameterValuet-statistic
ω

const

Unconditional variance weight

0.0059
3.70***
α

ARCH

Response to squared shocks

0.0860
41.64***
β

GARCH

Volatility persistence

0.9019
427.25***
γ

leverage

Additional response to negative shocks

0.5624
29.27***

Persistence:

0.988

Half-life:

57 days