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V-Lab
V-Lab

Taiwan Stock Exchange Weighted Index Asy. MEM Volatility Analysis

Volatility prediction for Thursday, September 17th, 2026

1 Day

19.80%

decreased by 0.89%

1 Week

19.79%

decreased by 0.90%

1 Month

19.73%

decreased by 0.96%

Analysis last updated: Wednesday, September 16, 2026 at 09:03 AM UTC

Date Range:

from

to

6M ·

1Y ·

2Y ·

5Y ·

10Y ·

All

graph of Taiwan Stock Exchange Weighted Index AMEM

News Impact Curve

How returns affect tomorrow's volatility

Volatility Forecast

How volatility evolves over time

Parameter Estimates

Mar 31, 1993 to Sep 11, 2026

Model Insight

Volatility shocks decay with a half-life of 20 trading days, meaning a shock loses half its impact after approximately 20 days.

μ

AMEM Model

Tap to view equation

Shock decay: Shocks decay with a 20-day half-life
ParamValuet-stat
ωconst0.0520
1.66*
αARCH0.0795
1.35
βGARCH0.8361
20.29***
γleverage0.1002
1.24

0.966

Persistence

20d

Half-life
μ

AMEM Model

Tap to view equation

ParameterValuet-statistic
ω

const

Unconditional variance weight

0.0520
1.66*
α

ARCH

Response to squared shocks

0.0795
1.35
β

GARCH

Volatility persistence

0.8361
20.29***
γ

leverage

Additional response to negative shocks

0.1002
1.24

Persistence:

0.966

Half-life:

20 days