Tokyo Stock Exchange Tokyo Stock Price Index TOPIX Asy. MEM Volatility Analysis
Volatility prediction for Friday, October 16th, 2026
1 Day
20.34%
increased by 5.75%
1 Week
20.35%
increased by 5.76%
1 Month
20.38%
increased by 5.79%
Analysis last updated: Friday, October 16, 2026 at 11:49 PM UTC
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News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Jan 4, 1990 to Oct 8, 2026Model Insight
This asset exhibits a notable leverage effect: negative returns increase next-day volatility 95% more than equivalent positive returns.
μ
AMEM Model
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Leverage: Negative returns increase volatility 95% more than positive returns
| Param | Value | t-stat |
|---|---|---|
| ωconst | 0.0636 | 9.66*** |
| αARCH | 0.1482 | 8.79*** |
| βGARCH | 0.7428 | 61.08*** |
| γleverage | 0.1413 | 4.39*** |
0.962
Persistence18d
Half-lifeμ
AMEM Model
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| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.0636 | 9.66*** |
α ARCH Response to squared shocks | 0.1482 | 8.79*** |
β GARCH Volatility persistence | 0.7428 | 61.08*** |
γ leverage Additional response to negative shocks | 0.1413 | 4.39*** |
Persistence:
0.962
Half-life:
18 days
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